Instructive but uneven book that pairs well with The Fourth Turning Is Here [*] , as both books offer similar paradigms of wheels-within-wheels generational cycles turning inside longer-term civilizational cycles. Readers get a rapid and mostly overwhelming review of world history, as author Peter Turchin gives various examples of how his "meta-ethnic frontier theory" drives the rise ("imperiogenesis") and decline ("imperiopathosis") of empires. We start with a tour of medieval Russia's evolution into a unified state, and then proceed through more and more and more examples from history, each involving explanatory whirlwind tours of massive historical eras. This brings us to a problem with Turchin's attempt to "model" history. First, he has to explain his model, ideally using an interesting example: he does this successfully with medieval Russia. But before you can really prove that your model fits history, you have to discuss all the re...
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