Maybe you could just address a couple of Gatto's points here instead of sending me off on a wild goose chase? Just go to the pdf of the book I linked to and go to the first reference to "Murray." He talks about statistics from Jamaica and South Africa. What do your folks say? Are Jamaican blacks and/or South African blacks conveniently defined as some other "breeding population" or are Gatto's statistics wrong?
I'll admit that at first blush, blacks can appear to be rather stupid. But I heard Willie Mays speak when he came up to the majors; and I hear him now. He's the same person, but now he's not quite so stupid.
ML/NJ