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In the book, "Guns, Germs, and Steel", by Jared Diamond, he delineates the migration of all our ancestors across the globe, originating from Africa. We are all one people. It's that simple. One misconception needs to be corrected, Trump is not human.
The cradle of life. I cannot remember the exact number but genetically all humans come from the same group of 10,000 people from way back when.
You got it, Sir. Physical differences are mostly due to environmental factors along they're migration path and the longitude/latitude where they settled. The era is also a factor; ice age stages, and general climate conditions.
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