I don’t believe in objective morality. In other words, I don’t believe in the independent existence of the categories, “good” and “evil,” nor do I believe that we ought to do some things and ought not to do others by virtue of some moral law that exists as a thing in itself, independent of what anyone merely thinks ought or ought not to be done. I consider the above to be simple facts. As such they don’t imply anything whatever about how we ought or ought not to behave.
Of course, many people disagree with me. Given what morality actually is, that is entirely predictable. It is basically a manifestation of innate behavioral predispositions in creatures with large brains. Those predispositions exist by virtue of natural selection. They enhanced the odds that we would survive and reproduce by spawning a powerful illusion that some behaviors are good and others evil, regardless of what anyone’s opinion about them happens to be. Belief in objective morality is just that; an illusion. It’s an interesting fact that many atheists, who imagine they’ve freed themselves of religious illusions, nevertheless embrace this illusion that good and evil exist as real things. I submit that, if what they believe is true, and there actually is an objective moral law, then it is entirely irrelevant.
Most atheists, including myself, consider evolution by natural selection to be the most plausible explanation for the existence of all the diverse forms of life on our planet. If that theory is true, then we exist because our ancestors were successful at carrying the packets of genes responsible for programming the development of their physical bodies from one generation to the next. Of course, these genes have undergone many changes over the eons, and yet they have existed in an unbroken chain for a period of over two billion years. Each of the physical bodies they spawned in the process only existed for an insignificant fraction of that time, and that will be true of each of us as well. Seen from that perspective, you might say that “we” are our genes, not our conscious minds. They have existed for an unimaginably long time, and are potentially immortal, whereas our conscious selves come and go in the blink of an eye by comparison.
This process that explains our existence has neither a purpose nor a goal. It does not reflect a design, because there is no designer, nor do we or anything about us have a “function,” because a function implies the existence of such a designer. We simply exist as a result of a natural process that would appear to be very improbable, and yet is possible given conditions that are just right on one of the trillions of planets in our vast universe.
Under the circumstances, we must decide for ourselves what goal or purpose we are to have in life. The universe certainly hasn’t assigned one to us, but life would be rather boring without one. This begs the question of what that goal or purpose should be. There is no right or correct choice, because the universe doesn’t care one way or the other. In making it we are completely on our own. I personally have made my goals in life my own survival and reproduction, and the preservation of biological life in general into the indefinite future. It seems to me these goals are in harmony with the reasons I exist to begin with. They are not better or worse than anyone else’s goals, for the simple reason that there is no basis for making that judgment. They are, however, my goals, and I will pursue and defend them accordingly.
Let’s assume for the sake of argument that there is an objective morality, and moral goods and evils exist as real things. Suppose someone were to point out to me that my goals in life are bad according to that objective moral standard. My reply would be, “So what?” No God or other conscious entity is out there, monitoring whether I conform to the moral law or not. The universe has no conscious mind, and so is incapable of punishing or rewarding my behavior. For the same reason it is also completely incapable of assigning that responsibility to others of my species. Any atheist who believes differently is not really an atheist at all, because a universe or some entity in the universe capable of assigning purpose is, for all practical purposes, a God.
Suppose some defender of the objective moral law were to claim that my personal goals were only achievable if I behaved in obedience to that law. In the first place, I would respond that it is remarkable indeed that the objective moral law just happens to be the exact way I should behave in order to achieve my personally assigned goals. In the second, I would take note of the fact that no reliable way has yet been discovered of detecting what the objective moral law actually is. A bewildering array of different moralities exist, and new ones are concocted every day, all claiming to be the “real” moral law. Under the circumstances, it seems to me that it would be much simpler for me to pursue my goals directly rather than trying to pick the “real” objective moral law from among the myriad versions on tap, in the hope that being “good” according to the version I choose will have the indirect effect of promoting my chosen goals.
In short, the question of whether there is an objective morality “out there” or not is a matter of complete indifference. If such an entity does exist, we have been singularly incompetent at detecting what it is, and, as far as the universe is concerned, it doesn’t matter whether we conform to it or not. The universe isn’t keeping score.