If there’s one god our culture worships as piously as sex, it’s children. But sex and children, sexual intimacy and familial intimacy, have something in common — beyond the fact that one leads to the other: both belong to us as creatures of nature, not as creators in culture. After Rousseau and Darwin and Freud, and with evolutionary psychology preaching the new moral gospel, we’ve become convinced that our natural self is our truest one. To be natural, we believe, is to be healthy and free. Culture is confinement and deformation. But the Greeks thought otherwise. To them, our highest good is not what we share with the animals, but what we don’t share with them, not the nature we’re born with, but the culture we make from it — make, indeed, against it.