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Selection on the genetic predictors of cognitive performance peaked in the Bronze Age and has left no trace at all in the last 2,000 years.

Drawn from what David Reich said

Subjectevolutionary biology
What this subject means

evolutionary biology Natural selection as an explanation, including the problem of how cooperation survives it.

What David Reich actually said

  1. David Reich Geneticist at Harvard Medical School
    And what you see when you look at intelligence is you see that this maxes out in the Bronze Age between 5,000, 4,000, 3,000, 2,000 years ago. And the impact in the last 2,000 years is almost nothing. There's no evidence of natural selection at all.

    Where this was said

    Watch from 0:31:29 plays here

    ↗David Reich – Bronze Age shock, the Neanderthal puzzle, & the sudden spread of farmingyoutube.com

    8 May 2026 · video · 2h 13m · spoken · machine transcript

    All 26 korrents from this recordingthis one is 8th

Added to korrents 7 Sept 2026 · How quotes work · Something wrong? Tell us

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