I got interested because of the video title, but chess is just the example he uses to enter the subject.  Why aren't women as good at chess as men?  What that leads to is the question, why aren't there more women at the highest level of math and science?  There are a variety of theories. The two main ones are: a) lack of participation, and b) inherent differences in mental ability at the highest level.  In other words, even though on average, women have the same mental abilities as men, there are more really brilliant men and more really stupid men.  And then, does the same theory apply when it comes to professional sports and the dominance of African American athletes at the highest level?   

Why do men dominate chess?

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