the more i learn about the 1920s, the more i think that maybe that ol 90 year cycle thesis is basically correct 
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What 90 year cycle theory?
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You’ll like Peter Turchin
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Nice summary. I thought about including the car in my recent rant on how the ice cream parlor cranks were ultimately correct, but left it out for simplicity.https://twitter.com/moritheil/status/1141757535441100800 …
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