My conclusion is that it is not religion but atheism that requires a Darwinian explanation. Atheism is a bit like homosexuality: one is not sure where it fits into a doctrine of natural selection. Why would nature select people who mate with others of the same sex, a process with no reproductive advantage at all? It seems equally perplexing why nature would breed a group of people who see no higher purpose to life or the universe. Here is where the biological expertise of Dawkins, Pinker, and Wilson could prove illuminating. Maybe they can turn their Darwinian lens on themselves and help us understand how atheism, like the human tailbone and the panda’s thumb, somehow survived as an evolutionary leftover of our primitive past.