Evidence of sex differences

A leftist-evolutionst professor concedes sex differences:

The two sex differences I find most evolutionarily convincing involve human sexual behavior — in particular the observation that males tend to be relatively indiscriminate in choosing someone to mate with, while females are pickier—and the fact that males are more aggressive than females. I feel that these behavioral differences are likely, at least in part, to be the result of sexual selection in our ancestors. ...

1.) The behavior is consistent across different cultures, when one would expect different degrees and kinds of socialization. ...

2.) We don’t find, as expected under the socialization theory, larger amounts male aggression in societies that have stricter gender roles and less gender equality. ...

3.) Males are more aggressive than females from the very beginning of childhood, presumably before they’ve had a chance to be socialized. ...

4.) The pattern of male aggression conforms to what we expect if it evolved to promote competition for females. ...

5.) In many species of animals, including our closest relatives, males are more aggressive than females.

All this should be pretty obvious.

There is also a lot of evidence for Sex Differences in Cognition.

The professor struggled with this comment:

Be careful. The same arguments you use could be used for the differences in aggression among races.

What are you on about? We are talking about predictions from evolutionary theory as well as experimental results, none of which exist for racial differences in aggression (and I know of none). Which races are you talking about and what are the differences.

Wow, he knows of no evidence? Some races commit violent crimes at ten times the rate of other races. And aggression and a lot of other behavioral traits have been shown to be heritable. Some primate species are more aggressive than others.