So is cannabis
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I married my 2nd cousin , but not blood relative

6 kids 110+ I QsThanks. Twitter will use this to make your timeline better. UndoUndo
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Interested to see Iceland IQ scores going back as far as the records can?
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Diminishing returns? How bored do you think a population with avg iq 200 would be with child rearing? Why bother when they could crack immortality? Diminishing returns...
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I'm all for human flourishing. But there are diminishing returns. People used to have lots of kids when kids were an economic asset. And crappy contraception. That genie isn't going anywhere.
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Birth rates plummet as soon as people move to cities.pic.twitter.com/OQoBQ06WLX
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Yeah, it's been going down for decades since 1960
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Pakisanis in Britain account for 30% of the birth defects, despite being only about 2% of the population.
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Is it a coincidence that U.S. black Americans that happen to have European names have a higher IQ that those right out of the jungles of Africa?
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Depends. It’s how we breed dogs.
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Better selection
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Cousin marriage historically has been a way of keeping family fortunes intact.
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It costs 10+ IQ points
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On average, but if the example of dogs is any guide, you can select for intelligence and hang onto those genes. :)
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Thanks for making the point!
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