What does the out of Africa theory maintain? Cro-Magnon man replaced Neanderthals who had originated in Africa remains of hominids and early humans have only been found in Africa civilizations started in Africa and spread to other parts of the world modern humans originated in Africa and migrated to other parts of the world

modern humans originated in Africa and migrated to other parts of the world.

Explanation:

The proposition "Out of Africa" is an evolutionary theory which explains that modern human has been originated from Africa about 100,000–200,000 years ago and then have migrated to different parts of the world following the late Pleistocene. The advancement of genetic analytics techniques in the 1980s exposed scientists to the hypothesis named out of Africa. The model emphasizes that while the world once inhabited by different human-like creatures, only one has evolved into modern man.

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explanation:

disease was the number one killer of native peoples. they had had little exposure to the diseases of europe. this led to some villages being almost completely wiped out and some tribes destroyed.