Mostly fair comment Acorns. Certainly the point that IQ testing is only one type of measure of human performance is very valid. As for IQ testing being a product of education - yes, a little bit even though it's theoretically education neutral. But really not that much. I believe 10 points is about the max swing education can provide.

That all types of intelligence and indeed human qualities generally are selected for in every environment is also true - but the stress given to each certainly varies. In the case of sub-Saharan Africa, it makes sense that attributes like physical agility, eyesight etc would be selected for the potential to solve differential equations.

All I was really getting at is that these IQ performances Phil was referencing are products of environment and circumstance, as oppose to anything inherent to race.