The main purpose of most genes in the human genome is regulating the expression of other genes in the genome. - Matt Ridley

TP53 seems to encode the greater good, like a suicide pill in the mouth of a soldier that dissolves only when it detects evidence that he is about to mutiny.

Anaxagoras’ belief that lying on the right side during sex would produce a boy was so influential that centuries later some French aristocrats had their left testicles amputated.

And I end with one of the strangest of the consequences of sex: that the choosiness of human beings in picking their mates has driven the human mind into a history of frenzied expansion for no reason except that wit, virtuosity, inventiveness, and individuality turn other people on. It is a somewhat less uplifting perspective on the purpose of humanity than the religious one, but it is also rather liberating. Be different.