>>24
And the rest of the world is only now caching on?
No. Most of the world has had cattle herding for millenia also.
all of it has the same basic climate
Nope. India and South East asia have a tropical climate like much of sub-saharran Africa and Central America.
the important bits of it were in the hands of European conquerors and colonists
Africa was exposed to old world crops, cattle and technology for millenia through trade with the arab world, mesoamericans had no exposure whatsoever until Columbus.
>>25
Victory determines "civilization level", Ghengis Khan had superior military technology even if his economic technology wasn't as sophisticated.