Of course cognitive abilities differ between populations.


We don't need to look at cumbersome inductive evidence. We need only deduction.

If a trait is heriditable, and it is different between individuals, then it is subject to evolutionary pressure. So all we need is to show that cognitive abilities differ between individual people, and that there are heriditable aspects. I would show, but neither of these two is in much dispute.

It's all you need. Everything else is creationist obfuscation: the idea that evolution somehow stops at the human brain, which is the realm of the soul.