Could this have to so with smart people increasing pursuing hedonism over reproduction? Maybe Idiocracy was right all along.
From a strict evolutionary perspective I have doubts that a high IQ is useful anymore.
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From a strict evolutionary perspective I have doubts that a high IQ is useful anymore.
A big part of "The Bell Curve" was arguing that no interventions could change IQ except genetics and so any money spent on low IQ people (African-Americans in the book, but the author followed up by attacking poor people more generally) was a pointless waste.
It turns out he wasn't just an asshole, he was also wrong.
It should be self-evident that you can lower IQ through environment (injury, developmental issues, malnourishment, etc.). So even if you believe there's a genetic ceiling to IQ, Flynn effect (and reverse) don't contradict that.