The Ancient Egyptians and Greeks built lots of huge decently engineered structures and a lot of other clever shit as well. imo their levels of intelligence could surpass modern levels of intelligence.
The Egyptians and The Greeks invented mathematics, logic, and lots of different approaches to philosophy that r easily equivalent to many things we have today.

these niggas are considered of below average intelligence based on controversial uncredible modern means of intelligence measurement when they're actually not. Therefore; Modern means of Intelligence measurement (IQ) are not accurate.

How are they of below average intelligence when they were able to do all of this with primitive shit?

Conclusion:
Sociological factors, culture, environment, politics, and access to education play the main role in intelligence, not genetics (pic related)
IQ fails to measure things like creativity intelligence, curiosity intelligence, and social intelligence, etc..
IQ is irrelevant, IQ is ahistorical. Period.
/pol/ believes in pseudoscience https://en.wikipedia.org/wiki/Scientific_racism

oh and btw, that map you posted is the world distribution of INDIGENOUS people. GG WP