How much more generous it would be if, instead of writing parables about childhood wounds, psychologists were to accept that some differences between the sexes just are, that they are in the nature of the beasts, because each sex has an evolved tendency to develop that way in response to experience.

Life is a Sisyphean race, run ever faster toward a finish line that is merely the start of the next race

You need to understand how human beings bring together their brains and enable their ideas to combine and recombine, to meet and, indeed, to mate. In other words, you need to understand how ideas have sex.

Trade is 10 times as old as farming.

Considering the way evolution works, it should not be surprising if every man has got a Don Giovanni somewhere inside him.

The interaction of genetic and external influences makes my behaviour unpredictable, but not undetermined. In the gap between those words lies freedom.

Society works not because we have consciously invented it, but because it is an ancient product of our evolved predispositions. It is literally in our nature.