@MikeAnissimov @hbdchick I found Volkmar Weiss' case for fast genetic drop by differential reproduction compelling, what am I missing?
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Replying to @MikeAnissimov
@MikeAnissimov@hbdchick this is the one I'm talking about http://www.humanbiologicaldiversity.com/articles/Weiss,%20Volkmar.%20%22The%20Population%20Cycle%20Drives%20Human%20History%20_%20from%20a%20Eugenic%20Phase%20into%20a%20Dysgenic%20Phase%20and%20Eventual%20Collapse.%22%20The%20Journal%20of%20Social,%20Political%20and%20Economic%20Studies%2032%20(2007).pdf …1 reply 0 retweets 2 likes -
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Replying to @MikeAnissimov
@MikeAnissimov@hbdchick among other things he calculates a 2/3 st dev drop in South African iq in 115 years just from composition1 reply 0 retweets 0 likes -
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Replying to @MikeAnissimov
@MikeAnissimov@hbdchick iq heritability + big differences in reproduction by iq for a few generations1 reply 0 retweets 0 likes -
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Replying to @MikeAnissimov
@MikeAnissimov@hbdchick increase is a hard, slow, linear process; decrease can be fast/exponential1 reply 0 retweets 0 likes
@MikeAnissimov when traits aren't under selection (or are actively being selected out) it's easier to lose them than to get new ones
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Replying to @MikeAnissimov
@MikeAnissimov seems easy to model, worst case say top 15% doesn't reproduce at all & bottom 15% each have 10 kids, FAST shift in 1 gen1 reply 0 retweets 0 likes - 3 more replies
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