IQ returns to the mean of the people in the last six or so generations. Hence why some academic and noble families through selective marriage have been constant since the fifteenth century and why normans are still in the top 20% of british.
Source date (UTC): 2023-07-15 20:57:21 UTC
Original post: https://twitter.com/i/web/status/1680320669819494402
Reply addressees: @Gene76244311 @prussian_blue__ @Logos_Elect @Lord__Sousa
Replying to: https://twitter.com/i/web/status/1680318833972727809
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