Female sexual liberation is the only common factor.https://twitter.com/KirkegaardEmil/status/1408900732670066691 …
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I... didn't blame them on hormonal birth control....
Didn't say you did - that is a common argument though for the why of both fertility falling and for female sexual liberation.
Either it gets undone or peoples intelligent enough to produce hormonal birth control go extinct. Saying it's impossible is ruling out almost every society in human history.
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