Door # 3: dietary improvements (especially iodine and protein consumption)
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Thanks. Twitter will use this to make your timeline better. UndoUndo
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And probably decline in secondhand smoke around kids
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That came rather late, no?
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you're gonna need a bigger asterisk
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can you imagine what we're fucking up today?
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yeah this but also heavily underrated is vast improvement in literacy and childhood education rates; i've no doubt both of these things contribute to increased IQ
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also pretty certain 1900 was the middle of the S curve and we're now nearing the top - you can see it in the Olympians as well. Performance in top tier athletics appear to be nearing the top of a logistic curve
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