But, American "blacks" have a 15 point difference because they're [EDIT] about 20% European. Africans have average IQs of 70.
[EDIT]: Citation (see also), though I should note that it is questioned.
Africans have average IQs of 70.
The best evidence available today indicates that this is simply false. A recent systematic literature review of Africans' performance on IQ tests other than Raven's Progressive Matrices finds an average IQ of around 82. An analogous review of results from Africans who took the Raven's Progressive Matrices finds a similar average of about 80.
Please remember to have no heroes or villains, but this just looks plain bad to be honest. I'm lowering my estimation of the quality of Stephen J. Gould's work in this area.
USA today:
Haha. Humans.
The paper itself: