@MikeAnissimov @hbdchick among other things he calculates a 2/3 st dev drop in South African iq in 115 years just from composition
@MikeAnissimov probably a decent estimate for some populations; worldwide much more extreme. also keep in mind generational compounding.
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@MikeAnissimov just saw this as I said that, haha https://westhunt.wordpress.com/2014/03/23/burning-seed-corn/ …Thanks. Twitter will use this to make your timeline better. UndoUndo
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