Essentially evolution created three races. Evolution we are taught required as its most important component " adaptability". Early man had to hunt and forage irrespective of where they lived. They had to provide shelter, fight off their enemies, etc.

It would seem historical events played a larger role in development then climate.

It was said that when European were still tribal Romans welcomed strangers into their village instead of killing them or refusing them entry. Hence they learned new ways from these welcoming strangers.

So the coming together of people and the disappearance of tribes seems to have been of importance. So too it follows essentially good leaders.

As to intelligence race has no bearing there are probably as many geniuses in Asia as in Africa as in Europe......Its in the historical perspective, society type of governing, etc that permits creative people to be creative. etc. caste systems, corrupt governments ,etc

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