Women cannot increase their fecundity by taking more mates; men can. - Matt Ridley

Nobody doubts that genes can shape anatomy. The idea that they also shape behaviour takes a lot more swallowing.

The cornucopia that greets you as you enter the supermarket dwarfs anything that Louis XIV ever experienced (and it is probably less likely to contain salmonella).

The evolutionary implication is that we are descended from a common ancestor with flies which used the same way of defining the pattern of the embryo more than 530 million years ago, and that the mechanism was so good that all this dead creature’s descendants have hung on to it.