I think a second discomfort with the biological approach to the human mind is the worry that it somehow makes our ideals a sham or less real. Life would be a Potemkin Village, where there's only a facade of value and worth, but really biology is showing that there's nothing behind the facade. For example, if we love our children because the genes for loving children are in the bodies of those children and so the genes are benefiting themselves, doesn't that undermine the purity or the value of that love? If our ethical ideals, our sense of justice and fairness, were selected for because it did our ancestors good in the long run, would that imply that there's no such thing as altruism or justice, that deep down we're really selfish?

I think that this reaction is based on a misreading of Richard's metaphor of the selfish gene. It's not because of what Richard actually said in his book The Selfish Gene, which is crystal clear. But here's how it could be misread: the theory says that one can make powerful predictions about the process of natural selection by imagining that the gene has a selfish motive to make copies of itself. Of course no one ever thought that a gene has real motives in the sense that people have motives, but it this is a valuable way to gain insight about the subtleties of natural selection, especially when it comes to social interactions, and it leads to many correct predictions.

Here is the distortion. People think that genes are our deepest hidden self, our essence, so if our genes are selfish, that means that deep down we're selfish. It's an unholy hybrid of Freud's idea of unconscious motivation and the straightforward modern theory of the natural selection of replicators. Now, I think I'm safe to say that it was not intended by Richard, and it doesn't follow from the logic of the theory. The metaphorical motives of the genes are not somehow a more fundamental or honest version of the real motives of the entire person. Indeed, sometimes the most "selfish" thing a gene can do, in this metaphorical sense of selfish, is to build a brain that is not selfish -- not selfish at an unconscious level, not selfish at any level -- even if the genes are themselves metaphorically selfish. When we love our children we aren't at any level of the brain calculating that it will increase our inclusive fitness. The love can be pure and in and of itself in terms of what's actually happening in the brain. The selfishness of genes explains why we have that pure emotion.

The idea that morality itself would be a fiction if our moral reasoning came out of some evolved moral sense is also a non sequitur. The fear comes from the fact that we know that many aspects of human experience are in some sense figments. The qualitative distinction between red, yellow, green, and blue, for example, is not out in the world; it's just the way our brain imposes arbitrary cuts in the continuous spectrum of the wavelength of light. Well, if the qualitative difference between red and green is a figment -- it's just the way we're built, it doesn't have any external reality -- could right and wrong also be a figment? Would the sense of worth that comes from pursuing justice and fairness be a sham, just a way of tickling our pleasure centers and making us feel good because of the flow of chemicals or the wiring diagram of the brain?

Not at all. This supposed devaluation of morality does not follow from the idea that we have an evolved moral sense. Many of our faculties evolved to mesh with real things in the world. We have a complicated system of depth perception and shape recognition that prevents us from bumping into trees and falling off cliffs. The fact that our ability to recognize an object comes from complicated circuitry of the brain does not mean that there aren't real objects out there. Indeed, the brain evolved in order to give us as accurate a representation as possible of what is objectively out in the world.

That may also be true, at least according to some philosophical arguments, for morality. Many philosophers believe that some abstract entities, such as numbers, have an existence independent of minds. That is, many philosophers and mathematicians believe that the number three is not just a figment in the way that the color red is, but that it has a real existence, which mathematicians discover and explore with their mathematical faculties; they don't invent it. Similarly, many moral philosophers argue that right and wrong have an existence, and that our moral sense evolved to mesh with them. Even if you don't believe that, there's an alternative that would make the moral sense just as real -- namely, that our universal moral sense is constituted so that it can't work unless we believe that right and wrong have an external reality. So if you want to stop short of saying that moral truths exist outside us, you can say that we can't reason other than by assuming that they do. In that case, when we get down to having a moral debate, we still appeal to external standards of right and wrong; we aren't reduced to comparing idiosyncratic emotional or subjective reactions.