We’ve discussed recent DNA findings quite a bit in various threads; this post at Razib Khan’s Unsupervised Learning is an attempt to pull them together into one package. It starts with a potted history of IE studies (“In 1780’s Calcutta, Sir William Jones was a 30-something British polymath with a particular talent for linguistics…”) and eventually gets down to business:
Language’s inherent flexibility kept scholars debating into this century whether Indo-European languages had diffused via memes or genes. But now with a 2024 crop of blockbuster Indo-European papers and preprints, I think it’s fair to say we have answered the biggest questions Jones raised and are in the late stages of settling most of the minor outstanding ones.
We know now that our genes and our words concur. Far more than recent generations of scholars predicted. We actually kind of are what we speak. But ancient DNA has taken us further still. The tree of our demographic history is an often startlingly strong match to historical linguistics’ shadow tree. And now, 2024 has brought a surfeit of results in two high-impact papers, leaving us a stack of refinements and details with which to update our models. […]
In 2015, only five years into the paleogenomic era, two research teams independently published blockbuster findings that in the period just after 3000 BC, right when scholars like archaeologist Marija Gimbutas had long argued for Indo-European languages expanding into the continent, Europe did indeed see a massive demographic turnover. But whereas Gimbutas’ intellectual heirs, like David Anthony, had theorized a mostly elite migration that would have registered at most a modest genetic impact, while wholly overhauling linguistic patterns, genetics told us that actually across much of northern Europe over half of ancestry was replaced. Today, scholars broadly agree that the Pontic steppe’s Yamnaya people, who contributed this new ancestry, both spoke proto-Indo-European, and aggressively expanded all across Eurasia beginning around 5,000 years ago, overnight shouldering aside venerable Neolithic civilizations from Britain to Central Asia. Between 3000 and 2300 BC, the Yamnaya and their descendents substantially replaced the indigenous peoples across the European continent’s width and breadth.
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