Adam at 3:47 is definitely a Chad (Chadam?), not a Virgin.
I like the Rushtonian ensuing part about how most humans are some kind of medium brown but three populations on the edge of the world’s population — Northern Europeans, West Africans, and Chinese — look quite different:
I dunno why Britain and Japan get left out, but it’s an interesting argument. Fifty years later, JP Rushton would point out that on numerous behavioral measures, in North America, West Africans and East Asians tended to be at the extremes statistically, with Europeans in the middle.