>>17965568
>>Why did civilization first arise in warmer climates like egypt and mesopotamia, where the modern IQ is near 80?
Large concentrations of fertile land in one place

>Why was Europe never a cradle of civilization, or really have any large state later than like 500 BC?
See first point. Arable land in Europe spread out all over the place. No suitable spot for first civilizations to arise

>>For that matter why did all indian civilization arise in mesoamerica, i.e hot as shit, and not the colder North America?
Population density. The entire North American continent had lower population than Utah meanwhile South and Central Americas had tens of millions of people

>>Why are the indians low IQ when they evolved in Siberia/Canada, far colder than Europe?
Amerindians are like 90 IQ which isn't too bad on global standards. Also see pic

>Tierra del Fuego is comparative to Europe in temperature but only hunter-gatherers ever came from there too
probably low population density