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So as my question states above, what if the ancestors of Native Americans never migrated into the Americas, either the winter gets colder or they just dont have interest. How does this effect Europes colonization of the Americas, and how does it effect Asia, since the ancestors of Native Americans are still there, would this lead to larger Asian populations? Would anybody else come to the Americas, if so, how would they cope and could there civilizations reach the size and power of OTL's inhabitants?
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