Don't have the ref. onhand but read recently that African populace shows the greatest genetic diversity in Homo sapiens sapiens.
India comes in at second place, presumably because of larger migration to the subcontinent compared to Europe.
India comes in at second place, presumably because of larger migration to the subcontinent compared to Europe.
I recommend E. O. Wilson's "Social Conquest of Earth" as a reference for quantifying the genetic difference within and between populations.
Doesn't surprise me that both went extinct. If we're still this prejudiced towards each other in the 21st century, I have little doubt that we played a large role in their extinction
You make a good point that the emigrants did mix in a peppering of genes from their early-arriving distant cousins. But overall, only a tiny fraction of the available gene pool made it out of Africa.