Posted on February 1st, 2016 1 comment
Inertial confinement fusion, or ICF, is one of the two “mainstream” approaches to harnessing nuclear fusion in the laboratory. As its name would imply, it involves dumping energy into nuclear material, commonly consisting of heavy isotopes of hydrogen, so fast that its own inertia hold it in place long enough for significant thermonuclear fusion to occur. “Fast” means times on the order of billionths of a second. There are, in turn, two main approaches to supplying the necessary energy; direct drive and indirect drive. In direct drive the “target” of fuel material is hit directly by laser or some other type of energetic beams. In indirect drive, the target is mounted inside of a “can,” referred to as a “hohlraum.” The beams are aimed through holes in the hohlraum at the inner walls. There they are absorbed, producing x-rays, which supply the actual energy to the target.
To date, the only approach used at the biggest ICF experimental facility in the world, the National Ignition Facility, or NIF, at Lawrence Livermore National Laboratory (LLNL), has been indirect drive. So far, it has failed to achieve the goal implied by the facility’s name – ignition – defined as more fusion energy out than laser energy in. A lot of very complex physics goes on inside those cans, and the big computer codes used to predict the outcome of the experiments didn’t include enough of it to be right. They predicted ignition, but LLNL missed it by over a factor of 10. That doesn’t necessarily mean that the indirect drive approach will never work. However, the prospects of that happening are becoming increasingly dim.
Enter direct drive. It has always been the preferred approach at the Naval Research Laboratory and the Laboratory for Laser Energetics (LLE) at the University of Rochester, the latter home of the second biggest laser fusion facility in the world, OMEGA. They lost the debate to the guys at LLNL as the NIF was being built, but still managed to keep a crack open for themselves, in the form of polar direct drive. It would have been too difficult and expensive to configure the NIF beams so that they would be ideal for indirect drive, but could then be moved into a perfectly symmetric arrangement for direct drive. However, by carefully tailoring the length and power in each of the 192 laser beams, and delicately adjusting the thickness of the target at different locations, it is still theoretically possible to get a symmetric implosion. That is the idea behind polar direct drive.
With indirect drive on the ropes, there are signs that direct drive may finally have its turn. One such sign was the recent appearance in the prestigious journal, Physics of Plasmas, of a paper entitled Direct-drive inertial confinement fusion: A review. At the moment it is listed as the “most read” of all the articles to appear in this month’s issue, a feat that is probably beyond the ability of non-experts. The article is more than 100 pages long, and contains no less than 912 references to work by other scientists. However, look at the list of authors. They include familiar direct drive stalwarts like Bob McCrory, John Sethian, and Dave Meyerhofer. However, one can tell which way the wind is blowing by looking at some of the other names. They include some that haven’t been connected so closely with direct drive in the past. Notable among them is Bill Kruer, a star in the ICF business who specializes in theoretical plasma physics, but who works at LLNL, home turf for the indirect drive approach.
Will direct drive ignition experiments happen on the NIF? Not only science, but politics is involved, and not just on Capitol Hill. Money is a factor, as operating the NIF isn’t cheap. There has always been a give and take, or tug of war, if you will, between the weapons guys and the fusion energy guys. It must be kept in mind that the NIF was built primarily to serve the former, and they have not historically always been full of enthusiasm for ignition experiments. There is enough energy in the NIF beams to create conditions sufficiently close to those that occur in nuclear weapons without it. Finally, many in the indirect drive camp are far from being ready to throw in the towel.
In spite of that, some tantalizing signs of a change in direction are starting to turn up. Of course, the “usual suspects” at NRL and LLE continue to publish direct drive papers, but a paper was also just published in the journal High Energy Density Physics entitled, A direct-drive exploding-pusher implosion as the first step in development of a monoenergetic charged-particle backlighting platform at the National Ignition Facility. An exploding pusher target is basically a little glass shell filled with fusion fuel, usually in gaseous form. For various reasons, such targets are incapable of reaching ignition/breakeven. However, they were the type of target used in the first experiments to demonstrate significant fusion via laser implosion at the now defunct KMS Fusion, Inc., back in 1974. According to the paper, all of the NIF’s 192 beams were used to implode such a target, and they were, in fact, tuned for polar direct drive. However, they were “dumbed down” to deliver only a little over 43 kilojoules to the target, only a bit more than two percent of the design limit of 1.8 megajoules! Intriguingly enough, that happens to be just about the same energy that can be delivered by OMEGA. The target was filled with a mixture of deuterium (hydrogen with an extra neutron), and helium 3. Fusion of those two elements produces a highly energetic proton at 14.7 MeV. According to the paper copious amounts of these mono-energetic protons were detected. Ostensibly, the idea was to use the protons as a “backlighter.” In other words, they would be used merely as a diagnostic, shining through some other target to record its behavior at very high densities. That all sounds a bit odd to me. If all 192 beams are used for the backlighter, what’s left to hit the target that’s supposed to be backlighted? My guess is that the real goal here was to try out polar direct drive for later attempts at direct drive ignition.
All I can say is, stay tuned. The guys at General Atomics down in San Diego who make the targets for NIF may already be working on a serious direct drive ignition target for all I know. Regardless, I hope the guys at LLNL manage to pull a rabbit out of their hat and get ignition one way or another. Those “usual suspects” among the authors I mentioned have all been at it for decades now, and are starting to get decidedly long in the tooth. It would be nice if they could finally reach the goal they’ve been chasing for so long before they finally fade out of the picture. Meanwhile, I can but echo the words of Edgar Allan Poe:
Over the Mountains
Of the Moon,
Down the Valley of the Shadow,
Ride, boldly ride,
The shade replied —
If you seek for El Dorado.
Posted on June 12th, 2015 10 comments
The fact that the various gods that mankind has invented over the years, including the currently popular ones, don’t exist has been sufficiently obvious to any reasonably intelligent pre-adolescent who has taken the trouble to think about it since at least the days of Jean Meslier. That unfortunate French priest left us with a Testament that exposed the folly of belief in imaginary super-beings long before the days of Darwin. It included most of the “modern” arguments, including the dubious logic of inventing gods to explain everything we don’t understand, the many blatant contradictions in the holy scriptures, the absurdity of the notion that an infinitely wise and perfect being could be moved to fury or even offended by the pathetic sins of creatures as abject as ourselves, the lack of any need for a supernatural “grounding” for human morality, and many more. Over the years these arguments have been elaborated and expanded by a host of thinkers, culminating in the work of today’s New Atheists. These include Jerry Coyne, whose Faith versus Fact represents their latest effort to talk some sense into the true believers.
Coyne has the usual human tendency, shared by his religious opponents, of “othering” those who disagree with him. However, besides sharing a “sin” that few if any of us are entirely free of, he has some admirable traits as well. For example, he has rejected the Blank Slate ideology of his graduate school professor/advisor, Richard Lewontin, and even goes so far as to directly contradict him in FvF. In spite of the fact that he is an old “New Leftist” himself, he has taken a principled stand against the recent attempts of the ideological Left to dismantle freedom of speech and otherwise decay to its Stalinist ground state. Perhaps best of all as far as a major theme of this blog is concerned, he rejects the notion of objective morality that has been so counter-intuitively embraced by Sam Harris, another prominent New Atheist.
For the most part, Faith versus Fact is a worthy addition to the New Atheist arsenal. It effectively dismantles the “sophisticated Christian” gambit that has encouraged meek and humble Christians of all stripes to imagine themselves on an infinitely higher intellectual plane than such “undergraduate atheists” as Richard Dawkins and Chris Hitchens. It refutes the rapidly shrinking residue of “God of the gaps” arguments, and clearly illustrates the difference between scientific evidence and religious “evidence.” It destroys the comfortable myth that religion is an “other way of knowing,” and exposes the folly of seeking to accommodate religion within a scientific worldview. It was all the more disappointing, after nodding approvingly through most of the book, to suffer one of those “Oh, No!” moments in the final chapter. Coyne ended by wandering off into an ideological swamp with a fumbling attempt to link obscurantist religion with “global warming denialism!”
As it happens, I am a scientist myself. I am perfectly well aware that when an external source of radiation such as that emanating from the sun passes through an ideal earthlike atmosphere that has been mixed with a dose of greenhouse gases such as carbon dioxide, impinges on an ideal earthlike surface, and is re-radiated back into space, the resulting equilibrium temperature of the atmosphere will be higher than if no greenhouse gases were present. I am also aware that we are rapidly adding such greenhouse gases to our atmosphere, and that it is therefore reasonable to be concerned about the potential effects of global warming. However, in spite of that it is not altogether irrational to take a close look at whether all the nostrums proposed as solutions to the problem will actually do any good.
In fact, the earth does not have an ideal static atmosphere over an ideal static and uniform surface. Our planet’s climate is affected by a great number of complex, interacting phenomena. A deterministic computer model capable of reliably predicting climate change decades into the future is far beyond the current state of the art. It would need to deal with literally millions of degrees of freedom in three dimensions, in many cases using potentially unreliable or missing data. The codes currently used to address the problem are probabilistic, reduced basis models, that can give significantly different answers depending on the choice of initial conditions.
In a recently concluded physics campaign at Lawrence Livermore National Laboratory, scientists attempted to achieve thermonuclear fusion ignition by hitting tiny targets containing heavy isotopes of hydrogen with the most powerful laser system ever built. The codes they used to model the process should have been far more accurate than any current model of the earth’s climate. These computer models included all the known relevant physical phenomena, and had been carefully benchmarked against similar experiments carried out on less powerful laser systems. In spite of that, the best experimental results didn’t come close to the computer predictions. The actual number of fusion reactions hardly came within two orders of magnitude of expected values. The number of physical approximations that must be used in climate models is far greater than were necessary in the Livermore fusion codes, and their value as predictive tools must be judged accordingly.
In a word, we have no way of accurately predicting the magnitude of the climate change we will experience in coming decades. If we had unlimited resources, the best policy would obviously be to avoid rocking the only boat we have at the moment. However, this is not an ideal world, and we must wisely allocate what resources we do have among competing priorities. Resources devoted to fighting climate change will not be available for medical research and health care, education, building the infrastructure we need to maintain a healthy economy, and many other worthy purposes that could potentially not only improve human well-being but save many lives. Before we succumb to frantic appeals to “do something,” and spend a huge amount of money to stop global warming, we should at least be reasonably confident that our actions will measurably reduce the danger. To what degree can we expect “science” to inform our decisions, whatever they may be?
For starters, we might look at the track record of the environmental scientists who are now sounding the alarm. The Danish scientist Bjorn Lomborg examined that record in his book, The Skeptical Environmentalist, in areas as diverse as soil erosion, storm frequency, deforestation, and declining energy resources. Time after time he discovered that they had been crying “wolf,” distorting and cherry-picking the data to support dire predictions that never materialized. Lomborg’s book did not start a serious discussion of potential shortcomings of the scientific method as applied in these areas. Instead he was bullied and vilified. A kangaroo court was organized in Denmark made up of some of the more abject examples of so-called “scientists” in that country, and quickly found Lomborg guilty of “scientific dishonesty,” a verdict which the Danish science ministry later had the decency to overturn. In short, the same methods were used against Lomborg as were used decades earlier to silence critics of the Blank Slate orthodoxy in the behavioral sciences, resulting in what was possibly the greatest scientific debacle of all time. At the very least we can conclude that all the scientific checks and balances that Coyne refers to in such glowing terms in Faith versus Fact have not always functioned with ideal efficiency in promoting the cause of truth. There is reason to believe that the environmental sciences are one area in which this has been particularly true.
Under the circumstances it is regrettable that Coyne chose to equate “global warming denialism” a pejorative term used in ideological squabbles that is by its very nature unscientific, with some of the worst forms of religious obscurantism. Instead of sticking to the message, in the end he let his political prejudices obscure it. Objections to the prevailing climate change orthodoxy are hardly coming exclusively from the religious fanatics who sought to enlighten us with “creation science,” and “intelligent design.” I invite anyone suffering from that delusion to have a look at some of the articles the physicist and mathematician Lubos Motl has written about the subject on his blog, The Reference Frame. Examples may be found here, here and, for an example with a “religious” twist, here. There he will find documented more instances of the type of “scientific” behavior Lomborg cited in The Skeptical Environmentalist. No doubt many readers will find Motl irritating and tendentious, but he knows his stuff. Anyone who thinks he can refute his take on the “science” had better be equipped with more knowledge of the subject than is typically included in the bromides that appear in the New York Times.
Alas, I fear that I am once again crying over spilt milk. I can only hope that Coyne has an arrow or two left in his New Atheist quiver, and that next time he chooses a publisher who will insist on ruthlessly chopping out all the political Nebensächlichkeiten. Meanwhile, have a look at his Why Evolution is True website. In addition to presenting a convincing case for evolution by natural selection and a universe free of wrathful super beings, Professor Ceiling Cat, as he is known to regular visitors for reasons that will soon become apparent to newbies, also posts some fantastic wildlife pictures. And if it’s any consolation, I see his book has been panned by John Horgan. Anyone with enemies like that can’t be all bad. Apparently Horgan’s review was actually solicited by the editors of the Wall Street Journal. Go figure! One wonders what rock they’ve been sleeping under lately.
Posted on December 7th, 2014 No comments
The Blank Slate affair was probably the greatest scientific debacle in history. For half a century, give or take, an enforced orthodoxy prevailed in the behavioral sciences, promoting the dogma that there is no such thing as human nature. So traumatic was the affair that no accurate history of it has been written to this day. What was it about the Blank Slate affair that transmuted what was originally just another false hypothesis into a dogma that derailed progress in the behavioral sciences for much of the 20th century? After all, the blank slate as a theory has been around since the time of Aristotle. A host of philosophers have supported it in one form or another, including John Locke, Jean-Jacques Rousseau, and John Stuart Mill. Many others had opposed them, including such prominent British moral philosophers as Shaftesbury, Hutcheson, Hume, and Mackintosh.
Sometimes the theories of these pre-Darwinian philosophers were remarkably advanced. Hume, of course, is often cited by evolutionary psychologists in our own time for pointing out that such human behavioral phenomena as morality cannot be derived by reason, and are rooted in emotion, or “passions.” In his words, “Reason is wholly inactive, and can never be the source of so active a principle as conscience, or a sense of morals.” The relative sophistication of earlier thinkers can also be demonstrated by comparing them with the rigid dogmas of the Blank Slaters of the 20th century who followed them. For example, the latter day dogmatists invented the “genetic determinist” straw man. Anyone who insisted, however mildly, on the existence of human nature was automatically denounced as a “genetic determinist,” that is, one who believes that human “instincts” are as rigid as those of a spider building its nest, and we are powerless to control them rationally. Real “genetic determinists” must be as rare as unicorns, because in spite of a diligent search I have never encountered one personally. The opponents of the Blank Slate against whom the charge of “genetic determinism” was most commonly leveled were anything but. They all insisted repeatedly that human behavior was influenced, not by rigid instincts that forced us to engage in warfare and commit acts of “aggression,” but by predispositions that occasionally worked against each other and could be positively directed or controlled by reason. As it happens, this aspect of the nature of our “nature” was also obvious to earlier thinkers long before Darwin. For example, 19th century British moral philosopher William Whewell, referring to the work of his co-philosopher Henry Sidgwick, writes,
The celebrated comparison of the mind to a sheet of white paper is not just, except we consider that there may be in the paper itself many circumstances which affect the nature of the writing. A recent writer, however, appears to me to have supplied us with a much more apt and beautiful comparison. Man’s soul at first, says Professor Sidgwick, is one unvaried blank, till it has received the impressions of external experience. “Yet has this blank,” he adds, “been already touched by a celestial hand; and, when plunged in the colors which surround it, it takes not its tinge from accident but design, and comes out covered with a glorious pattern.” This modern image of the mind as a prepared blank is well adapted to occupy a permanent place in opposition to the ancient sheet of white paper.
Note that Sidgwick was a utilitarian, and is often referred to as a “blank slater” himself. Obviously, he had a much more nuanced interpretation of “human nature” than the Blank Slaters of a later day, and was much closer, both to the thought of Darwin and to that of modern evolutionary psychologists than they. This, by the by, illustrates the danger of willy-nilly throwing all the thinkers who have ever mentioned some version of the blank slate into a common heap, or of ordering them all in a neat row, as if each one since the time of Aristotle “begat” the next after the fashion of a Biblical genealogy.
In any case, these pre-Darwinian thinkers and philosophers could occasionally discuss their differences without stooping to ad hominem attacks, and even politely. That, in my opinion, is a fundamental difference between them and the high priests of the Blank Slate orthodoxy. The latter day Blank Slaters were ideologues, not scientists. They derailed the behavioral sciences because their ideological narrative invariably trumped science, and common sense, for that matter. Their orthodoxy was imposed and enforced, not by “good science,” but by the striking of moralistic poses, and the vicious vilification of anyone who opposed them. And for a long time, it worked.
By way of example, it will be illuminating to look at the sort of “scientific” writings produced by one of these high priests, Richard Lewontin. Steven Pinker’s book, The Blank Slate, is occasionally flawed, but it does do a good job of describing the basis of Lewontin’s Blank Slate credentials. Interested readers are encouraged to check the index. As Pinker puts it,
So while Gould, Lewontin, and Rose deny that they believe in a blank slate, their concessions to evolution and genetics – that they let us eat, sleep, urinate, defecate, grow bigger than a squirrel, and bring about social change – reveal them to be empiricists more extreme than Locke himself, who at least recognized the need for an innate faculty of “understanding.”
Anyone doubting the accuracy of this statement can easily check the historical source material to confirm it. For example, in a rant against E. O. Wilson’s Sociobiology in the New York Review of Books, which Lewontin co-authored with Gould and others, we find, along with copious references to the “genetic determinist” bugbear,
We are not denying that there are genetic components to human behavior. But we suspect that human biological universals are to be discovered more in the generalities of eating, excreting and sleeping than in such specific and highly variable habits as warfare, sexual exploitation of women and the use of money as a medium of exchange.
Anyone still inclined to believe that Lewontin wasn’t a “real” Blank Slater need only consult the title of his most significant book on the subject, Not In Our Genes, published in 1984. What on earth was he referring to as “not in our genes,” if not innate behavior? As it happens, that book is an excellent reference for anyone who cares to examine the idiosyncratic fashion in which the Blank Slaters were in the habit of doing “science.” Here are some examples, beginning with the “genetic determinist” bogeyman:
Biological determinism (biologism) has been a powerful mode of explaining the observed inequalities of status, wealth, and power in contemporary industrial capitalist societies, and of defining human “universals” of behavior as natural characteristics of these societies. As such, it has been gratefully seized upon as a political legitimator by the New Right, which finds its social nostrums so neatly mirrored in nature; for if these inequalities are biologically determined, they are therefore inevitable and immutable.
Biological determinist ideas are part of the attempt to preserve the inequalities of our society and to shape human nature in their own image. The exposure of the fallacies and political content of those ideas is part of the struggle to eliminate those inequalities and to transform our society.
All of these recent political manifestations of biological determinism have in common that they are directly opposed to the political and social demands of those without power.
The Nobel Prize laureate Konrad Lorenz, in a scientific paper on animal behavior in 1940 in Germany during the Nazi extermination campaign said: “The selection of toughness, heroism, social utility… must be accomplished by some human institutions if mankind in default of selective factors, is not to be ruined by domestication induced degeneracy. The racial idea as the basis of the state has already accomplished much in this respect.” He was only applying the view of the founder of eugenics, Sir Francis Galton, who sixty years before wondered that “there exists a sentiment, for the most part quite unreasonable, against the gradual extinction of an inferior race.” What for Galton was a gradual process became rather more rapid in the hands of Lorenz’s efficient friends. As we shall see, Galton and Lorenz are not atypical.
Of course, Lewontin is a Marxist. Apparently, by applying the “dialectic,” he has determined that the fact that the process was even more rapid and efficient in the hands of his Communist friends doesn’t have quite the same “ideological” significance. As far as eugenics is concerned, it was primarily promoted by leftists and “progressives” in its heyday. Apparently Lewontin “forgot” that as well, for, continuing in the same vein, he writes:
The sorry history of this century of insistence on the iron nature of biological determination of criminality and degeneracy, leading to the growth of the eugenics movement, sterilization laws, and the race science of Nazi Germany has frequently been told.
The claim that “human nature” guarantees that inherited differences between individuals and groups will be translated into a hierarchy of status, wealth, and power completes the total ideology of biological determinism. To justify their original ascent to power, the new middle class had to demand a society in which “intrinsic merit” could be rewarded. To maintain their position they now claim that intrinsic merit, once free to assert itself, will be rewarded, for it is “human nature” to form hierarchies of power and reward.
Biological determinism, as we have been describing it, draws its human nature ideology largely from Hobbes and the Social Darwinists, since these are the principles on which bourgeois political economy are founded.
Everyone had to be stretched or squeezed to fit on the Procrustean bed of Lewontin’s Marxist dogma. In the process, E. O. Wilson became a “bourgeois” like all the rest:
More, by emphasizing that even altruism is the consequence of selection for reproductive selfishness, the general validity of individual selfishness in behaviors is supported. E. O. Wilson has identified himself with American neoconservative liberalism, which holds that society is best served by each individual acting in a self-serving manner, limited only in the case of extreme harm to others. Sociobiology is yet another attempt to put a natural scientific foundation under Adam Smith. It combines vulgar Mendelism, vulgar Darwinism, and vulgar reductionism in the service of the status quo.
This, then, was the type of “scientific” criticism favored by the ideologues of the Blank Slate. They had an ideological agenda, and so assumed that everything that anyone else thought, wrote, or said, must be part of an ideological agenda as well. There could be no such thing as “mere disagreement.” Disagreement implied a different agenda, opposed to clearing the path to the Brave New World favored by the Blank Slaters. By so doing it sought to institutionalize inequality, racism, and the evil status quo, and was therefore criminal.
It’s hard to imagine anything more important than getting the historical record of the Blank Slate affair straight. We possess the means of committing suicide as a species. Self-knowledge is critical if we are to avoid that fate. The Blank Slate orthodoxy planted itself firmly in the path of any advance in human self-knowledge for a great many more years than we could afford to squander. In spite of that, the bowdlerization of history continues. Lewontin and the other high priests of the Blank Slate are being reinvented as paragons of reason, who were anything but “blank slaters” themselves, but merely applied some salutary adult supervision to the worst excesses of evolutionary psychology. Often, they left themselves such an “out” to their own eventual rehabilitation by themselves protesting that they weren’t “blank slaters” at all. For example, again quoting from Lewontin:
Yet, at the same time, we deny that human beings are born tabulae rasae, which they evidently are not, and that individual human beings are simple mirrors of social circumstances. If that were the case, there could be no social evolution.
One can easily see through this threadbare charade by merely taking the trouble to actually read Lewontin. What Pinker has to say as noted above about the degree to which he was “not a blank slater” is entirely accurate. I know of not a single instance in which he has ever agreed that anything commonly referred to in the vernacular as “human nature,” as opposed to urinating, defecating, being taller than a squirrel, etc., is real. Throughout his career he has rejected the behavioral hypotheses of ethology (yes, I am referring to the behavior of animals other than man, as well as our own species), sociobiology, and evolutionary psychology root and branch.
It has been said that those who do not learn from history are doomed to repeat it. However, it’s not out of the question that we don’t have enough time left to enjoy the luxury of making the same mistake twice. Under the circumstances, we would be well-advised to take a very dim view of any future saviors of the world who show signs of adopting political vilification as their way of “doing science.”
Posted on October 1st, 2013 No comments
An article about fusion just appeared on the Livescience website promisingly entitled “Fusion Experiments Inch Closer to Break-Even Goal” that is unexceptionable hype except for one little detail; the goalpost for fusion ignition has been moved. It hasn’t been nudged. It hasn’t been tweaked. It has been torn up by the roots, carried down the road a few miles, and planted in an entirely new place that bears no resemblance to the original goal. The article in question is about fusion experiments at Lawrence Livermore National Laboratory’s (LLNL’s ) National Ignition Facility, usually referred to by its acronym, as the NIF. The goalpost is that which applies to inertial confinement fusion (ICF), which is the flavor being pursued at LLNL. The other mainstream approach is magnetic fusion, which will be implemented at the ITER facility currently under construction in France. Here’s the money quote from the article:
That got the NIF closer to the “scientific break-even point,” where the amount of energy that comes out of the fusion reaction is equal to that which was put in by the kinetic energy from the implosion. (The energy from the laser isn’t counted in the calculation). Right now, the amount of energy coming out of the NIF setup is about 80 percent of what is put in.
“NIF is built to ignite a fusion pellet,” said Stewart Prager, director of the Princeton Plasma Physics Laboratory. “They didn’t get it by the time they originally stated, but they are making progress.” The NIF was built in 2008; its original mandate was to achieve ignition — the break-even point — in 2012.
What’s wrong with this picture? LLNL explicitly agreed that “ignition” would occur at the point where fusion energy out equals laser energy in. They did so before a committee of prestigious scientists appointed by the National Academy of Sciences’ National Research Council to review the nation’s ICF program. It was entirely fitting and proper that they should do so, because that definition puts them on a level playing field with magnetic fusion. It’s not as if this is a minor point. After all, the very name of the facility in question is the National Ignition Facility. Now, suddenly, “ignition” is being redefined as “fusion energy out equals kinetic energy of the implosion put in!”
Why is this happening? Because, in spite of recent encouraging progress, the NIF is still a long way from achieving real ignition. Politicians are griping because the ignition they were promised hasn’t happened, and there have been dark mutterings about defunding the project. In other words, the NIF’s survival is at stake. I can see the problem. What I can’t see is that gross scientific dishonesty is the answer to the problem. For that strategy to succeed, it is necessary for virtually all the members of Congress to be fools. Although that is certainly a common assumption, it is not necessarily true. There are actually a few scientists in Congress, and I doubt that all of them can be hoodwinked into swallowing this latest redefinition of ignition.
What to do? Try telling it like it is. The NIF hasn’t achieved ignition, and maybe it never will. In spite of that, it remains the finest facility of its kind in the world for accomplishing the mission it was actually funded for; insuring the safety and reliability of our nuclear arsenal. No facility outside the United States can approach so closely the physical conditions that occur in nuclear explosions. No other facility is so precise, or has such a fine suite of diagnostics. The NIF gives us a huge leg up in maintaining our arsenal and avoiding technological surprise as long as nuclear testing is not resumed. As long as we have such facilities and the rest of the world doesn’t, it would be dumb for us to even think about resuming testing. It would be throwing away a massive advantage. Think none of our weaponeers wants to resume testing? Think again! The NIF and facilities like it are the best argument against them. Try pointing that out to Congress. I suspect it would work better than these ham-handed attempts to move the goalposts.
Posted on September 8th, 2013 3 comments
While a question such as “Can issues of morality be answered by scientific experiments?” may be important, introducing the term “scientism” with all its baggage distracts from addressing the question in a rational manner.
He certainly has a point, but what about the question itself? Can issues of morality be answered by scientific experiments? One answer to the question, as absurd as it is famous, was given by Steven Jay Gould. He claimed that science can’t answer moral questions because science and religion belong to “non-overlapping magisteria,” and issues of morality belong in the magisterium of religion. This “solution” relies on two separate fallacies of objectification; that there is a “science” object, and that separate, independent objects known as “issues of morality” also exist. In the first place, there is no such thing as a science “thing,” and in the second, good and evil have no independent existence as things-in-themselves.
In fact, issues of morality can’t be answered by scientific experiments because there are no such entities as issues of morality. Experiments can’t examine things that don’t exist. No one has ever invented a butterfly net good enough to capture so much as a single “good” or “evil” as it floats about through the ether. It turns out that they are more elusive by far than magnetic monopoles, for the very good reason that they don’t exist. It’s amazing how few evolutionary psychologists and others who appear to accept the evolutionary origin of moral emotions fail to grasp this fundamental fact. Moral emotions are part of the behavioral repertoire of several species of animals, including human beings. As such they cannot somehow transcend their fundamental nature as emotions in the minds of individual animals and acquire some sort of independent legitimacy. It is a testament to the power of these emotions that these seemingly obvious implications of their evolutionary origins are so often simply overlooked. It is not uncommon to find people who should know better alluding to a transcendental morality complete with “good” and “evil” objects in the very context of discussions of those origins.
A typical example appears in an essay by Michael Price on the This View of Life website of group selection proponent David Sloan Wilson. In an essay entitled “Why Evolutionary Science Is The Key To Moral Progress” he writes,
We’d be better able to move on from these disputes in productive ways—and thus to make moral progress—if we could better understand our own moral beliefs. But how can we do this when our beliefs seem so opaque to introspection? It’s easy to feel passionate about our beliefs, but how can we see behind our emotions, to find out where our beliefs came from and whether they are leading us to where we want to go? Evolutionary science provides the key to such moral progress.
When I say that evolutionary science is the key to moral progress, there’s at least one thing I don’t mean and two things I do mean.
What I don’t mean is that the evolutionary process itself can provide guidance about right or wrong. If something increased or increases reproductive fitness, does that mean we should judge it as morally good? Of course not; I agree with philosophers who identify such thinking as a flawed ‘appeal to nature’ or ‘naturalistic fallacy’. Consider behavioral outputs of what are probably evolved psychological adaptations: many of these (e.g. xenophobia) could usually be considered bad, whereas many others (e.g. parental investment) could usually be considered good. By the same token, many behaviors that are probably by-products of evolved adaptations (e.g. reading and mathematics) could be judged as good, whereas many others (e.g. crippling drug addiction) could be judged as bad. Suffice it to say: whether or not a behavior is adaptive, or whether it is the product or by-product of an evolved adaptation, implies nothing about its moral value.
Here, in the very context of a discussion of “evolved psychological adaptations,” we have an explicit statement of faith in the objective existence of such mystical entities as “good,” “bad,” “moral progress,” and “moral value.”
Obviously, Price does not consider it in the least necessary to explain his bald assumption that such objects actually exist independently of his own subjective perceptions. However, he can get away with this rational disconnect, because he can safely assume that his readers experience similar subjective perceptions. They, too, perceive “good,” “bad,” etc., as things. They do so, not because they really are objects and things-in-themselves, but because their perception as such has enhanced the probability that the individuals who experience them in that way will survive and reproduce. As far as evolution by natural selection is concerned, that’s all that matters. Evolution is a process, not a thing, and as such is not equipped to appreciate the rational inconsistency of “seeing” things that don’t exist.
Which brings us back to the title of this essay. Is science relevant to morality? Assuming we are not too finicky about the meaning of the word “science,” we can say that it is relevant to understanding the nature of moral emotions, and the reasons for their existence. However, when it comes to understanding “good” and “evil” as things, science is, indeed, useless. It is not possible to investigate objects that don’t exist using the scientific or any other method.
Posted on August 17th, 2013 No comments
In an article that appeared recently in The New Republic entitled, “Science is not Your Enemy,” Steven Pinker is ostensibly defending science, going so far as to embrace “scientism.” As he points out, “The term “scientism” is anything but clear, more of a boo-word than a label for any coherent doctrine.” That’s quite true, which is reason enough to be somewhat circumspect about self-identifying (if I may coin a term) as a “scientismist.” Nothing daunted, Pinker does just that, defending scientism in “the good sense.” He informs us that “good scientism” is distinguished by “an explicit commitment to two ideals,” namely, the propositions that the world is intelligible, and that the acquisition of knowledge is hard.
Let me say up front that I am on Pinker’s side when it comes to the defense of what he calls “science,” just as I am on his side in rejecting the ideology of the Blank Slate. Certainly he’s worthy of a certain respect, if only in view of the sort of people who have been coming out of the woodwork to attack him for his latest. Anyone with enemies like that can’t be all bad. It’s just that, whenever I read his stuff, I find myself rolling my eyes before long. Consider, for example, his tome about the Blank Slate. My paperback version runs to 500 pages give or take, and in all that prose, I find only a single mention of Robert Ardrey, and then only accompanied by the claim that he was “totally and utterly wrong.” Now, by the account of the Blank Slaters themselves (see, in particular, the essays by Geoffrey Gorer in Man and Aggression, edited by Ashley Montagu), Robert Ardrey was their most effective and influential opponent. In other words, Pinker wrote a thick tome, purporting to be an account of the Blank Slate, in which he practically ignored the contributions of the most important player in the whole affair, only mentioning him at all in order to declare him wrong, when in fact he was on the same side of the issue as Pinker.
Similar problems turn up in Pinker’s latest. For example, he writes,
Just as common, and as historically illiterate, is the blaming of science for political movements with a pseudoscientific patina, particularly Social Darwinism and eugenics. Social Darwinism was the misnamed laissez-faire philosophy of Herbert Spencer. It was inspired not by Darwin’s theory of natural selection, but by Spencer’s Victorian-era conception of a mysterious natural force for progress, which was best left unimpeded.
Here, as in numerous similar cases, it is clear Pinker has never bothered to read Spencer. The claim that he was a “Social Darwinist” was a red herring tossed out by his enemies after he was dead. Based on a minimal fair reading of his work, the claim is nonsense. If actually reading Spencer is too tedious, just Google something like “Spencer Social Darwinism.” Check a few of the hits, and you will find that a good number of modern scholars have been fair-minded enough to actively dispute the claim. Other than that, you will find no reference to specific writings of Spencer in which he promotes Social Darwinism as it is generally understood. The same could be said of the laissez faire claim. Spencer supported a small state, but hardly rejected stated intervention in all cases. He was a supporter of labor unions, and even was of the opinion that land should be held in common in his earlier writings. As for “Victorian-era” conceptions, if memory serves, Darwin wrote during that era as well, and while Spencer embraced Lamarckism and had a less than up-to-date notion of how evolution works, I find no reference in any of his work to a “mysterious natural force for progress.”
Pinker’s comments about morality are similarly clouded. He writes,
In other words, the worldview that guides the moral and spiritual values of an educated person today is the worldview given to us by science… The facts of science, by exposing the absence of purpose in the laws governing the universe, force us to take responsibility for the welfare of ourselves, our species, and our planet. For the same reason, they undercut any moral or political system based on mystical forces, quests, destinies, dialectics, struggles, or messianic ages. And in combination with a few unexceptionable convictions – that all of us value our own welfare and that we are social beings who impinge on each other and can negotiate codes of conduct – the scientific facts militate toward a defensible morality, namely, adhering to principles that maximize the flourishing of humans and other sentient beings.
In other words, Pinker has bought in to the Sam Harris “human flourishing” mumbo-jumbo, and thinks that the “facts of science” can somehow become material objects with the power to dictate that which is “good” and that which is “evil.” Here Pinker, in company with Harris, has taken leave of his senses. Based on what he wrote earlier in the essay, we know that he is aware that what we understand as morality is the expression of evolved behavioral traits. Those traits are their ultimate cause, and without them morality would literally cease to exist as we know it. They exist in the brains of individuals, solely by virtue of the fact that, at some point in the distant past utterly unlike the present, they promoted our survival. And yet, in spite of the fact that Pinker must understand, at least at some level, that these things are true, he agrees with Harris that the emotional responses, or, as Hume, whom Pinker also claims to have read, puts it, sentiments, can jump out of our heads, become objects, or things in themselves, independent of the minds of individuals, and, as such, can be manipulated and specified by the “facts of science.” Presumably, once the “educated” and the “scientists” have agreed on what the “facts of science” tell us is a “defensible morality,” at that point the rest of us become bound to agree with them on the meanings of “good” and “evil” that they pass down to us, must subordinate our own emotions and inherent predispositions regarding such matters to “science,” and presumably be justifiably (by “science”) punished if we do not. What nonsense!
“Science” is not an object, any more than “good” and “evil.” “Science” cannot independently “say” anything, nor can it create values. In reality, “science” is a rather vague set of principles and prescriptions for approaching the truth, applied willy-nilly if at all by most “scientists.” By even embracing the use of the term “science” in that way, Pinker is playing into the hands of his enemies. He is validating their claim that “science” is actually a thing, but in their case, a bête noire, transcending its real nature as a set of rules, more or less vaguely understood and applied, to become an object in itself. Once the existence of such a “science” object is accepted, it becomes a mere bagatelle to fix on it the responsibility for all the evils of the world, or, in the case of the Pinkers of the world, all the good.
In reality, the issue here is not whether this imaginary “science” object exists and, assuming it does, whether it is “good” or “evil.” It is about whether we should be empowered to learn things about the universe in which we live or not. The opponents of “scientism” typically rail against such things as eugenics, Social Darwinism, and the atomic bomb. These are supposedly the creations of the “science” object. But, in fact, they are no such thing. In the case of eugenics and Social Darwinism, they represent the moral choices of individuals. In the case of the atomic bomb, we have a thing which became possible as a result of the knowledge of the physical world acquired in the preceding half a century, give or take. What would the opponents of “scientism” have us change? The decision to build the atomic bomb? Fine, but in that case they are not opposing “science,” but rather a choice made by individuals. Opposition to “science” itself can only reasonably be construed as opposition to the acquisition of the knowledge that made the bomb possible to begin with. If that is what the opponents of “scientism” really mean, let them put their cards on the table. Let them explain to us in just what ways those things which the rest of us are to be allowed to know will be limited, and just why it is they think they have the right to dictate to the rest of us what we can know and what we can’t.
It seems to me this whole “science” thing is getting out of hand. If we must have an object, it would be much better for us to go back to the Enlightenment and use the term “reason.” It seems to me that would make it a great deal more clear what we are talking about. It would reveal the true nature of the debate. It is not about the “science” object, and whether it is “good” or “evil,” but about whether we should actually try to use our rational minds, or instead relegate our brains to the less ambitious task of serving as a convenient stuffing for our skulls.
Posted on March 3rd, 2013 No comments
Back in 2002, Robert Kurzban, who writes a blog for the journal Evolutionary Psychology, wrote a review of Alas, Poor Darwin: Arguments Against Evolutionary Psychology, by Steven and Hilary Rose. The Roses, ideological zealots and leftover Blank Slaters who have devoted their careers to scientific obscurantism, had regurgitated all the usual specious arguments against human nature, which had already become hackneyed by that time. Anyone with a passing interest in human behavior likely knows most of them by heart. They include the claim that the hypotheses of EP are unfalsifiable, that evolutionary explanations of human behavior serve evil political ends rather than science, etc. etc., usually topped off with that most ancient and threadbare red herring of them all, that anyone who dares to say anything nice about EP is a “genetic determinist.” In his review, entitled, “Alas Poor Evolutionary Psychology: Unfairly Accused, Unjustly Condemned,” Kurzban demolishes them all in turn, writing in his conclusion,
There are now a collection of dialogues in the popular press between evolutionary psychologists and their critics. The discussions all seem to have the same form: Critics assert that evolutionary psychologists are wrong in believing behavior is genetically determined, that every aspect of the organism is an adaptation, and that discovering what is informs what ought be. Evolutionary psychologists reply that they never made any of these claims, and document places where they claim precisely the reverse. The critics then reply that evolutionary psychologists are wrong in believing behavior is genetically determined, that every aspect of the organism is an adaptation, and that discovering what is informs what should be.
The contradictions between what evolutionary psychologists have said and what their critics have said they said are as clear as they are infuriating. All of the correctives that I have presented here have been discussed before, and all of them are in the pieces cited by the critics of evolutionary psychology. It is unfathomable how the Roses and the other contributors to Alas Poor Darwin could have come away from the primary literature with their impressions of genetic determinism, panglossian adaptationism, and so on.
I suspect that Kurzban fathomed the reasons well enough, even then. Such attacks on EP are not scientific refutations, but propaganda, designed to prop up pseudo-religious ideological shibboleths that happen to be badly out of step with reality. Even then, they already had all the familiar trappings of propaganda, including the “Big Lie”; endless repetition while studiously ignoring counter-arguments. Nothing has changed in the ensuing decade. “Genetic determinism” is still as much a fixture in the screeds of left-over Blank Slaters as ever. Pointing out the absurdity of the charge is as futile as trying to refute the charge of “fascism” by carefully explaining the theory of the corporate state. Razib Khan, who writes the Gene Expression blog for Discover magazine, notes that he was just denounced as a “genetic determinist” for daring to even question the scientific credentials of cultural anthropologists, in a couple of posts that didn’t so much as take up the question of the connection between genes and behavior.
All this points up a fact that is as true now as it was in the days of Galileo. “Science,” understood as a disinterested and cautious search for truth inspired by a spirit of skepticism, can still be as easily derailed by secular religious zealots as it was by the more traditional “spiritual” variety who intimidated Galileo and still fume against Darwin. The puerile myths of the Blank Slate represented the prevailing orthodoxy in the behavioral “sciences” for decades, propped up, not by a tolerant and open spirit of academic freedom, but by vilification and intimidation of anyone who dared to step out of line. Evolutionary psychologists are hardly the only victims, but they are probably the most prominent. They have the misfortune of representing an idea that happens to tread on far more ideological toes than most. Blank Slate orthodoxy is hardly unique in that regard.
For example, one of the common hypotheses of evolutionary psychology that there may be an innate component of human morality immediately elicits a “territorial defense” response from the legions of those who spend their time devising new moral systems for the edification of mankind. Most of them spend their time cobbling elaborate proofs of the existence of the Good just as their intellectual forebears once concocted proofs of the existence of God. Consider, for example, the case of the author of the Atheist Ethicist blog, who has demonstrated that, because a equals b and b equals c, it therefore follows that anyone who dares to claim that there is “an evolutionary basis for morality” is immoral. To make a long story short, the “ethicist” believes that those insidious evolutionary psychologists are not limiting themselves to studying the “is” of human moral behavior, but have a disquieting tendency to lap over into the “ought,” a territory which he has reserved for himself and his revolutionary moral system of “desire utilitarianism.” He does not actually name any specific examples of the most egregious of these evildoers, but no doubt we can trust him given his unique moral qualifications.
It isn’t difficult to find similar examples illustrating why the ideologically inspired find EP such a tempting target. However, the fact that it is is a stroke of very bad luck for our species. After all, EP is a field devoted to expanding our understanding of our selves, and there is no more critical knowledge than self-knowledge. For example, what if the greed of evil corporations, or the imperialist pretentions of certain uniquely evil races, or “frustration” don’t turn out to be completely adequate and all-encompassing explanations of human warfare after all? Is it really possible to know with absolute certainty that innate behavioral traits play no role whatsoever? If they do, the failure to discover and understand them may threaten our very survival. I happen to prefer survival to the alternative. For that reason, it seems to me that the time for refuting such charges as “genetic determinism” with patient, reasoned arguments is past. It is high time to begin fighting back against the ideological zealots with the same weapons they have long been using against their victims.
Posted on January 21st, 2013 No comments
The 155 intellectuals chosen by Edge.org to answer their annual question, (What *Should” we be Worried About?), were worried about a number of other interesting things besides Geoffrey Miller’s Chinese eugenics, discussed in my last post. One of these, which turned up in the contribution of philosopher Helena Cronin was the continuing rejection of evolved human nature, a subject I’ve also often discussed. Her worry is not overblown. The Blank Slaters may be in retreat, but they have hardly disappeared. One still often finds them grumbling on the sidelines of evolutionary psychology. Cronin refers to the phenomenon as a scientific “asymmetry,” which she describes as, “the discrepancy between the objective status of the science and its denigration by a clamorous crowd of latter-day Blakes.” (Painter and printmaker William Blake was a furious opponent of the Enlightenment whose famous print of Newton, shown below, depicts him as the embodiment of “desiccated rationality and soulless materialism.”) Her “worry” is worth quoting at length:
Generally, the public reception of a scientific theory concurs by and large with the judgement of the objective world of ideas. Not, however, in the case of the scientific understanding of our evolved human nature and, above all, male and female natures. If the arguments against the evolutionary science of human nature were conducted in the world of the objective content of ideas, there would be no contest; evolutionary theory would win hands down. But, as a sociological fact, in the public market-place it loses disastrously against its vociferous critics.
How? Because, in a complete reversal of the objective relationship between the science and these critics, all the asymmetries are reversed.
First, the burden of ‘proof’, the burden of argument, is transferred from the criticisms onto the science; it is Darwinism that’s on trial. Meanwhile, anti-Darwinian attitudes don’t have to defend themselves—they are accepted uncritically; the standards for judgement of these views involve all-too-ready credibility and suspensions of disbelief.
Second, adding insult to injury, a plethora of home-made alternatives is conjured up to fill the gap where the real science should be. This DIY-science includes: pseudo-methodological denunciations, where mere name-callings suffice—essentialist, reductivist, teleological, Panglossian (all very bad) and politically incorrect (very bad indeed); the immutable ‘entanglement’ of nature and nurture, which renders nature impenetrable—thereby freeing ‘pure nurture’ to be discussed at length; a cavalier disregard for hard-won empirical evidence—though with a penchant for bits of brains lighting up (no; I don’t know either); the magical potency of ‘stereotyping’ (bad) and ‘role models’ (good); a logic-defying power to work miracles on tabula-rasa psychologies, as in ‘socialisation’ (bad) and ’empowerment’ (good); made-up mechanisms, even though discredited—multi-tasking, self-esteem, stereotype threat; complaints of ‘controversial’ and ‘tendentious’ – which are true sociologically but false scientifically (a case of raising the dust and then complaining they cannot see). The science-free policy that this generates is epitomised by the ‘women into science’ lobby, which is posited on a ‘bias and barriers’ assumption and an a priori rejection of—yes, the science of sex differences.
This mish-mash is low on scientific merit. But it is not treated as opinion versus science. On the contrary, psychologically and sociologically, it has a voice far more influential and persuasive than its objective status warrants.
This double standard applied to evolutionary psychology, or “asymmetry,” as Cronin puts it, is hardly a figment of her imagination. It’s obvious to anyone not wearing blinkers. See, for example, evolutionary psychologist Robert Kurzban’s blog, where he is constantly fending off just such “asymmetrical” attacks as Cronin describes. The obscurantist “not in our genes” orthodoxy the Blank Slaters managed to prop up for so many decades in the behavioral sciences may have been broken, but they are still around. I suspect we will continue to detect their stench from the sidelines for some time, along with that of the old Marxists who spawned them.
There were some related comments in the bit submitted by anthropologist John Tooby. Tooby is described by Edge, without batting an eye, as “the founder of the field of evolutionary psychology.” Apparently the ever-fluid “history” of the field has been revised again, and I didn’t even notice. One can only speculate that the last “founder of the field of evolutionary psychology,” E. O. Wilson, has been deposed because of his embrace of group selection. Be that as it may, in his contribution, embellished with the catchy title, “Unfriendly Physics, Monsters From The Id, And Self-Organizing Collective Delusions,” Tooby cites a number of existential threats to the survival of mankind, and suggests that we may be ill-equipped to deal with them because of the way we do science. As he puts it, scientists are no more immune than anyone else to “the self-organizing collective delusions that we all participate in, and mistake for reality.” Elaborating on this theme, he writes,
Because intellectuals are densely networked in self-selecting groups whose members’ prestige is linked (for example, in disciplines, departments, theoretical schools, universities, foundations, media, political/moral movements, and other guilds), we incubate endless, self-serving elite superstitions, with baleful effects: Biofuel initiatives starve millions of the planet’s poorest. Economies around the world still apply epically costly Keynesian remedies despite the decisive falsification of Keynesian theory by the post-war boom (government spending was cut by 2/3, 10 million veterans dumped into the labor force, while Samuelson predicted “the greatest period of unemployment and industrial dislocation which any economy has ever faced”). I personally have been astonished over the last four decades by the fierce resistance of the social sciences to abandoning the blank slate model in the face of overwhelming evidence that it is false. As Feynman pithily put it, “Science is the belief in the ignorance of experts.”
I heartily concur. Behavioral scientists, in particular, would do well to turn their gaze inward for a change, and explain to the rest of us how they could have been so wrong about something so critical to us all for so long as human nature.
Posted on December 3rd, 2012 No comments
According to the frontispiece of his The Evolution of Man, published in 1924, Grafton Elliot Smith held the titles of M.A., M.D., Litt. D., D.Sc., F.R.C.P., F.R.S., and Professor of Anatomy at the University of London. If titles and academic honors are any guide, he must have been a very intelligent man. He was well aware of the limitations of human intelligence, and wary of the influence of the emotions on judgments of fact. For example, in the book referred to above, from which all the following quotes are taken as well, he wrote,
The range of true judgment is in fact extremely limited in the vast majority of human beings. Emotions and the unconscious influence of the environment in which an individual has grown up play an enormous part in all his decisions, even though he may give a rational explanation of the motives for many of his actions without realizing that they were inspired by causes utterly alien to those which he has given – and given without any intention of dishonesty – in explanation of them. It is the exception rather than the rule for men to accept new theories on evidence that appeals to reason alone. The emotional factor usually expresses itself in an egotistical form. The ‘will to believe’ can often be induced by persuading a man that he discovered the new theory of his own initiative.
No one could have written a better post mortem for Smith’s career. When it came to questions that really mattered about the evolution of man, he had a positive penchant for getting it wrong. Regarding the issue of whether erect posture or a large brain came first in the transition from ape to man, he noted in passing,
The case for the erect attitude was ably put by Dr. Munro (Neil Gordon Munro, better known for his studies of the Japanese Ainu, ed.) in 1893. He argued that the liberation of the hands and the cultivation of their skill lay at the root of Man’s mental supremacy.
Smith would have done well to listen to Munro, not to mention Charles Darwin and Ernst Haeckel, both of whom proposed similar, “bipedalism before large brain” theories. However, he would have none of it, writing,
It was not the adoption of the erect attitude that made Man from an Ape, but the gradual perfecting of the brain and the slow upbuilding of the mental structure, of which erectness of carriage is one of the incidental manifestations.
Noting that the above quote was included in the substance of an address to the British Association delivered in the autumn of 1912, he rejoiced in a latter chapter that his conjecture had been followed almost immediately by a “dramatic confirmation”:
Within the month after its delivery a dramatic confirmation was provided of the argument that in the evolution of Man the brain led the way. For the late Mr. Charles Dawson (in association with Dr. – now Sir Arthur – Smith Woodward) brought to light in Sussex the remains of a hirtherto unknown type of Primate with a brain that, so far as size is concerned, came within the range of human variation, being more than 200 c.cm. larger than that of the more ancient and primitive member of the Human Family (Pithecanthropus), in association with a jaw so like that of a Chimpanzee that many of the leading palaeontologists believed it to be actually the remains of that Ape.
This, of course, was the famous Piltdown Man, probably the most damaging scientific forgery of all times, proved in 1953 to be a composite of a medieval human skull and the jaw of an orangutan. It was probably fabricated by Dawson himself, who had a knack for making similar “sensational” finds, and whose antiquarian collection was found to include at least 38 specimens that were “clear fakes” after his death. Ironically, its discovery induced just such a “will to believe” in Smith as he had warned his readers about earlier in the book. He rationalized the “genuineness” of Piltdown Man with arguments that were formidably “scientific” and astoundingly intricate. For example,
When the skull is restored in this way (according to an intricate reconstruction process described earlier, ed.) its conformation is quite distinctive, and differs profoundly from all other human skulls, recent or fossil. The parietal bone exhibits a peculiar depression between the diverging temporal lines, and the lower margin of the bone, below the depression, is everted. This creates a peculiarity in the form of the cranium that is found in the Gorilla and Chimpanzee. But the simian resemblances are revealed most strikingly in a transverse section of the reconstructed Piltdown Skull, when compared with corresponding sections of those of a Chimpanzee, a Gorilla, and a modern European. It will then be realized how much more nearly the Piltdown skull approaches the simian type. The general form of the cranium in transverse section is greatly expanded like that of an Ape. This applies particularly to the contour of the parietal bones. But the construction of the temporal bone is even more strikingly Ape-like in character.
…and so on. One can but feel a painful and vicarious sense of shame for the worthy professor, who had so thoroughly succeeded in hoodwinking himself. Unfortunately, his weighty testimony hoodwinked many others as well, eventually including even Sir Arthur Keith, who had immediately smelled a rat and publicly cast doubt on the discovery, only to later accept the forgery as real against his better judgment with the help of Smith’s “coaching.”
Piltdown Man wasn’t the only sensational discovery of the day. Raymond Dart had also discovered the first specimen of Australopithecus Africanus in the same year as Smith’s book was published. Dart had immediately noticed evidence of the creature’s upright posture, but Smith would have none of it:
But there is no evidence to suggest that its posture differed from that of the Chimpanzee. The peculiarity in the position of the foramen magnum – which Professor Dart assumed to afford further corroboration of its human affinity – is merely an infantile trait that is found equally in other young Anthropoids.
Poor old Dart. He was always being “debunked” for being right. He was similarly “set straight” by his peers for suggesting that early man engaged in anything so unsavory and politically incorrect as hunting live game. Next it was the turn of Neanderthal Man. To add insult to the injury of his recent extinction, Smith’s unflattering description spawned a myriad museum displays of a stooped, bestial creature, seemingly unattractive as a sex partner except to the most desperate:
His short, thick-set, and coarsely built body was carried in a half-stooping slouch upon short, powerful, and half-flexed legs of peculiarly ungraceful form. His thick neck sloped forward from the broad shoulders to support the massive flattened head, which protruded forward, so as to form an unbroken curve of neck and back, in place of the alternation of curves which is one of the graces of the truly erect Homo sapiens.
In a word, Professor Smith left us with a wealth of disinformation that it took decades of careful research to correct. His example should teach us humility. His book and a few others like it should be required reading for nascent Ph.D.’s. Many of them will find little time for such ephemera later on in their struggles to stay up to speed with all the latest in the collection of learned journals that pertain to their specialty. Still, they might find it amusing and even informative to occasionally step back from the information maelstrom, dust off some of the old books and journals in forgotten stacks, and recall the foibles as well as the triumphs of their compatriots gone before. In ambling through the old source material, they’re likely to find that the history they find on the Internet isn’t always served straight up. As is regrettably the case with Prof. Smith, it often happens that some of the more egregious warts and blemishes have been charitably removed. They are likely to find the unexpurgated versions more helpful, especially if they happen to specialize in fields that are long on unfalsifiable theories and short on repeatable experiments.
Posted on October 22nd, 2012 2 comments
We have passed the end of the fiscal year, and the National Ignition Facility, or NIF, at Lawrence Livermore National Laboratory (LLNL) failed to achieve its goal of ignition (more fusion energy out than laser energy in). As I noted in earlier post about the NIF more than three years ago, this doesn’t surprise me. Ignition using the current indirect drive approach (most of the jargon and buzzwords are explained in the Wiki article on the NIF) requires conversion of the laser energy into an almost perfectly symmetric bath of x-rays. These must implode the target, preserving its spherical shape in the process in spite of a very high convergence ratio (initial radius divided by final radius), and launching a train of four shocks in the process, which must all converge in a tiny volume at the center of the target, heating it to fusion conditions. That will release energetic alpha particles (helium nuclei) which must then dump their energy in the surrounding, cold fuel material, causing a “burn wave” to propagate out from the center, consuming the remaining fuel. It would have been a spectacular achievement if LLNL had pulled it off. Unfortunately, they didn’t, for reasons that are explained in an excellent article that recently appeared in the journal Science. (Unfortunately, it’s behind a subscriber wall, and I haven’t found anything as good on the web at the moment. You can get the gist from this article at Huffpo.) The potential political implications of the failure were addressed in a recent article in the New York Times.
All of which begs the question, “What now?” My opinion, in short, is that the facility should remain operational, at full capacity (not on half shifts, which, for various reasons, would reduce the experimental value of the facility by significantly more than half).
I certainly don’t base that opinion on the potential of inertial confinement fusion (ICF), the technology implemented on the NIF, for supplying our future energy needs. While many scientists would disagree with me, I feel it has virtually none. Although they may well be scientifically feasible, ICF reactors would be engineering nightmares, and far too expensive to compete with alternative energy sources. It would be necessary to fabricate many thousands of delicate, precisely built targets every day and fill them with highly radioactive tritium. Tritium is not a naturally occurring isotope of hydrogen, and its half-life (the time it takes for half of a given quantity to undergo radioactive decay) is just over 12 years, so it can’t be stored indefinitely. It would be necessary to breed and extract the stuff from the reactor on the fly without releasing any into the environment (hydrogen is notoriously slippery stuff, that can easily leak right through several types of metal barriers), load it into the targets, and then cool them to cryogenic temperatures. There is not a reactor design study out there that doesn’t claim that this can be done cheaply enough to make ICF fusion energy cost-competitive. They are all poppycock. The usual procedure in such studies is to pick the cost number you need, and then apply “science” to make it seem plausible.
However, despite all the LLNL hype, the NIF was never funded as an energy project, but as an experimental tool to help maintain the safety and reliability of our nuclear stockpile in the absence of nuclear testing. The idea that it will be useless for that purpose, whether it achieves ignition or not, is nonsense. The facility has met and in some cases exceeded its design goals in terms of energy and precision. Few if any other facilities in the world, whether existing or planned, will be able to rival its ability to explore equations of state, opacities, and other weapons-relevant physics information about materials at conditions approaching those that exist in nuclear detonations. As long as the ban on nuclear testing remains in effect, the NIF will give us a significant advantage over other nuclear states. It seems to me that maintaining the ban is a good thing.
It also seems to me that it would behoove us to maintain a robust nuclear stockpile. Nuclear disarmament sounds nice on paper. In reality it would invite nuclear attack. The fact that nuclear weapons have not been used since 1945 is a tremendous stroke of luck. However, it has also seduced us into assuming they will never be used again. They will. The question is not if, but when. We could continue to be very lucky. We could also suffer a nuclear attack tomorrow, whether by miscalculation, or the actions of terrorists or rogue states. If we continue to have a stockpile, it must be maintained. Highly trained scientists must be available to maintain it. Unfortunately, babysitting a pile of nuclear bombs while they gather dust is not an attractive career path. Access to facilities like the NIF is a powerful incentive to those who would not otherwise consider such a career.
One of the reasons this is true is the “dual use” capability of the NIF. It can be used to study many aspects of high energy density physics that may not be relevant to nuclear weapons, but are of great interest to scientists in academia and elsewhere who are interested in fusion energy, the basic science of matter at extreme conditions, astrophysics, etc. Some of the available time on the facility will be reserved for these outside users.
As for the elusive goal of ignition itself, we know that it is scientifically feasible, just as we know that its magnetic fusion equivalent is scientifically feasible. The only question remaining is how big the lasers have to be to reach it. It may eventually turn out that the ones available on the NIF are not big enough. However, the idea that because we didn’t get ignition in the first attempts somehow proves that ignition is impossible and out of the question is ridiculous. It has not even been “proven” that the current indirect drive approach won’t work. If it doesn’t, there are several alternatives. The NIF is capable of being reconfigured for direct drive, in which the lasers are aimed directly at the fusion target. For various reasons, the beams are currently being frequency-tripled from the original “red” light of the glass lasers to “blue.” Much more energy, up to around four megajoules instead of the current 1.8, would be available if the beams were only frequency-doubled to “green”. It may be that the advantage of the extra energy will outweigh the physics-related disadvantages of green light. An interesting dark horse candidate is the “fast ignitor” scenario, in which the target would be imploded as before, but a separate beam or beams would then be used to heat a small spot on the outer surface to ignition conditions. An alpha particle “burn wave” would then propagate out, igniting the rest of the fuel, just as originally envisioned for the central hot spot approach.
Some of the comments following the Internet posts about NIF’s failure to reach ignition are amusing. For example, following an article on the Physics Today website we learn to our dismay:
With all due respect to the NIF and its team of well-meaning and enthusiastic researchers here, I am sorry to state hereby that sustainable nuclear fusion is predestined to fail, whether it be in the NIC, the Tokamak or anywhere else in solar space, for fundamentally two simple reasons paramount for fusion: ((1) vibrational synchronism (high-amplitude resonance) of reacting particles; and (2) the overall isotropy of their ambient field.
Obviously the commenter hadn’t heard that the scientific feasibility of both inertial and magnetic fusion has already been established. He reminds me of a learned doctor who predicted that Zadig, the hero of Voltaire’s novel of that name, must inevitably die of an injury. When Zadig promptly recovered, he wrote a thick tome insisting that Zadig must inevitably have died. Voltaire informs us that Zadig did not read the book. In an article on the IEEE Spectrum website, suggestively entitled National Ignition Facility: Mother of All Boondoggles?, another commenter chimes in:
How about we spend the billions on real research that actually has a chance of producing something useful? There are a gazillion ideas out there for research that has a much higher probability of producing useful results. Must be nice to work for LLNL where your ideas don’t need vetting.
In fact, the NIF was “vetted” by a full scale Federal Advisory Committee. Known as the Inertial Confinement Fusion Advisory Committee, or ICFAC, its members included Conrad Longmire, Marshall Rosenbluth, and several other experts in plasma physics and technology of world renown who had nothing whatsoever to gain by serving as shills for LLNL. It heard extensive testimony on plans to build the NIF, both pro and con, in the mid-90’s. Prominent among those who opposed the project was Steve Bodner, head of the ICF Program at the Naval Research Laboratory (NRL) at the time. Steve cited a number of excellent reasons for delaying major new starts like the NIF until some of the outstanding physics issues could be better understood. The Committee certainly didn’t ignore what he and other critics had to say. However, only one of the 15 or so members dissented from the final decision to recommend proceeding with the NIF. I suspect that LLNL’s possession of the biggest, baddest ICF computer code at the time had something to do with it. No one is better at bamboozling himself and others than a computational physicist with a big code. The one dissenter, BTW, was Tim Coffey, Director of NRL at the time, who was convinced that Bodner was right.
There are, of course, the predictable comments by those in the habit of imagining themselves geniuses after the fact, such as,
I am convinced. Garbage research.
Don’t these people feel ashamed telling so many lies?
after the IEEE Spectrum article, and,
It’s amazing to think that you can spout lies to the government to receive $6 billion for a machine that doesn’t come close to performing to spec and there are no consequences for your actions.
Following a post on the NIF at the LLNL – The True Story blog. Fortunately, most of the comments I’ve seen recently have been at a rather more thoughtful level. In any event, I hope Congress doesn’t decide to cut and run on the NIF. Pulling the plug at this point would be penny-wise and pound-foolish.