1) Assuming "IQ" helps success; the performance of a population would depend >>more on the variance than average.
(convexity, #Antifragile)
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2) This in short explains why linking IQ to success for populations is total nonsense in the presence of nonlinearity.pic.twitter.com/sMeLFdWWlx
Arthur Jensen wrote extensively about this in 1970s- 1990s, and it's well understood in IQ research, esp the sex diff in variance
