The 50s baby boom had less to do with # of kids per couple as % of people having kids.
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Replying to @EvolutionistXX
I forget the exact number, but a large % of ppl born in 1900 never had children, even women. Those who did have children had lots.
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Replying to @EvolutionistXX
(One of my great-great grandmothers lost half her children and still ended up with >5)
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Replying to @EvolutionistXX
By contrast, a much higher % of people got married and had kids in the post-war boom times than in 1900.
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Replying to @EvolutionistXX
So the Baby Boomer cohort includes a lot of people whose parents normally wouldn't have reproduced. Genetically, this probably isn't good.
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Replying to @EvolutionistXX
Books on raising chickens and sheep caution strongly against just letting your animals breed willy-nilly: the result is stock degradation.
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Replying to @EvolutionistXX
Soon you're stuck with a bunch of chickens who grow slowly and hardly lay eggs.
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Replying to @EvolutionistXX
Among other things, an increase in genetic susceptibility to mental problems might help explain the craziness of the late '60s
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Replying to @EvolutionistXX
Any references for the change/increase in # of people procreation, etc?
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Replying to @DoctorOcelot
I'm trying to find it. there was a graph going around these parts the other day, but I stupidly didn't save it.
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Gianni Retweeted Whyvert
Gianni added,
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also worth noting the differential fertility between rich and poor inverted prior to the 20th century.
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