The American peoples split off from the Asian peoples 25,000 years ago, and are the same intelligence today.
That would seem unlikely unless they were the same then as today.
That would seem unlikely unless they were the same then as today.
This is absolutey wrong and is history denial. Black people were in the Americas long before the Olmecs in central America (another ancient African civilization).
All these "Asian" people were highly melanated black people, (Asian historians understand this fact) and they are descendants of mostly fishermen related to Khoikhoi and modern day Xhosa people of south Africa.
It seems quite plausible older humans could all be significantly below 100 average and have just not figured anything out.
Its special pleading to say humans should be different.
IQ tests have ingrained cultural factors just like the standards of intelligence those tribes have.