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One of the authors of this paper, David Reich, has written a book called "Who We Are and How We Got Here", which is worth reading. My thoughts on it: https://www.goodreads.com/review/show/2605841954
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Earlier quoted context omitted.
There is a graph arguing “intelligence” has been positively selected in west Eurasian population in this paper according to a polygenic score (page 8 fig. 4) Now I would be quite curious to know how they constructed this polygenic score
... because it's a study of West Eurasian DNA. The claim that humanity has over millennia selected for intelligence isn't all that spicy.
Then to address the elephant in the room - which is the race discourse subtext let’s be honest - it’s highly unlikely that any recent selective pressure on a separated population, which resulted in meaningful phenotype adaptations, happened similarly everywhere at the same time