ADVANTAGES

Even if, contrary to all the data adduced here, humanity had originated in Africa, it seems contrived to assume that would have immediately migrated from that continent, to leave their earliest known (and all subsequent) cultural artifacts in Eurasia. But if (on the Afro-origins view) they did, did they evolve into the Eurasian ancestral type? What mechanisms, events, and pressures would conduce to such a change? Why did those other populations, said to be ‘first out of Africa’ (on account of their genetic diversity) such as the Andaman Islanders and tropical S. E. Asian types, experience any such change? Do the Afro-origin people perhaps that the speciation event created the Eurasian type from archaic ? The invocation of "genetic drift" and "founder effect", as used to assert a counter-intuitive interpretation of the diversity gradient (Tishkoff et al., 1998)5, will not serve.

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