Islamic State was depicted in the media as a bunch of terrorist masterminds. The leadership was supposedly strategic to maximize fear by encouraging Muslims to inflict bloodshed around the world and then bragging about it over social media. But pundits were too busy extolling the genius of this evil strategy to realize that the caliphate was going up in smoke. The Islamic State’s plight was predictable from the get-go because the leaders failed to follow the rules for rebels. The author has extensively studied the political plights of hundreds of militant groups throughout world history and reveals that successful militant leaders have followed three rules. These rules are based on original insights from the fields of political science, psychology, criminology, economics, management, marketing, communication, and sociology. It turns out there’s a science to victory in militant history. But even rebels must follow rules.