Machiavelli wrote that fortune—misfortune in fact—aims herself where “dikes and dams have not been made to contain her.” Clausewitz said that battle plans were great but ultimately subject to “friction”—delays, confusion, mistakes, and complications. What is friction? Friction is when you’re Pericles and you lay out a brilliant plan to defend Athens against Sparta and then your city is hit by the plague. Friction is when your trusted research tells you one thing but you come to find the situation on the ground is completely different, that the data had it all wrong. Friction is the Russian
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