"between 1500 and 1800, European polities were at war during 80 to 90 percent of all years...effective political and military institutions repeatedly emerged, competed, recombined, and spread at the expense of less effective configurations" https://t.co/fjWPbU7Xsf pic.twitter.com/BdRrO5T5U1
— Rob Henderson (@robkhenderson) December 14, 2020
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