Who We Are and How We Got There
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As a pre-teen boy growing up in previously glaciated parts of the Northern Plains, I found it difficult to believe that the complex civilizations of South America could have evolved in such a relatively short time. Studies of the Quaternary Glacial period told me that there were three to five interglacial periods ... not merely the most recent ... during which people from Asia could have easily arrived in North and South America biy walking ... long before that last 12,000+ year period. As a boy I had only an intuitive, common-sense hunch about these things ... but now ...
DNA research of several isolated tribes in the Amazon Basin demonstrates that, yes, they crossed over from Asia as much as 26,000 years ago. Difficulties with these South America tribes has made expanded research into the time period difficult, but genetically those tribes are most closely related to Australians, New Guineans and ...Andamanese ... and not to most Native Americans, whose ancestors came from Siberia.
In case anyone is imagining Polynesian-type craft escorting the ancestors of Aboriginal Australians across the Pacific to the shores of western South America: the idea under consideration is that the ancestors of indigenous Australians, New Guineans, etc and these South American groups represent a population that once lived in Asia but no longer persist there. This group is postulated to have had descendants that migrated south toward New Guinea and Australia, and north, across Beringia and then south eventually arriving in South America.
Truly exciting to recognize how much of our history remains accessible if only we are able to uncover and interpret it
"... and not to most Native Americans, whose ancestors came from Siberia."
They all came through Siberia, did they not ? It is a question of timing I suppose with dna of the people crossing the bridge - 25000 years ago more akin to other travelers of that period ( NG & Australia ) rather than more recent wanderers.
Thor's theory sucks but his sailing trip was one of a kind.
I'll take the opportunity to add the touchstone: David Reich, Who we are and how we got here : ancient DNA and the new science of the human past
The point that made the most impression on me is the persistence (one wonders if permanence is the more adequate term) of violence throughout human history / prehistory.
A recent book on violence that I also found interesting is "The Great Leveler: Violence and the History of Inequality", by Walter Scheidel. Reich underlines how violence increases inequality, while Scheidel shows how violence, mass violence, has (at times) lessened inequality.
Also, of course, the discussion of migrations in Reich's book was fascinating and important too. The information on the Indo-Europeans is really eye-opening. There were a lot of theories regarding the Indo-Europeans, now we have much better evidence than ever before.
The notion that "race-mixing" isn't new, but goes back many thousands of years is also important. Mass Migration, like violence, seems to be a persistent fact of human history.
I agree with everything you said. I expect new discoveries, especially about even earlier periods, to follow. Hopefully soon.
Another book, this time one I haven't seen, is "The war on ordinary people", by Andrew Yang. I think his diagnosis is right, jobs are drying up for ordinary people; but his cure is wrong. Universal Basic Income eventually must lead to slavery.
I shouldn't however, review books I haven't read. I expect to pick this up soon.
Crossing From Asia, the First Americans Rushed Into the Unknown:
Three new genetic analyses lend detail, and mystery, to the migration of prehistoric humans throughout the Western Hemisphere.