How do the norms of the liberal international order affect the activity of Islamist movements? This book analyzes and assesses the extent to which Islamist groups, which have traditionally attempted to shield their communities from “alien” moral conceptions, have been affected by the rules and principles that regulate international society. Through an analysis of Lebanon’s Hezbollah, Filippo Dionigi concludes that international norms are among the most significant factors changing Islamist politics. The result is a precarious but innovative equilibrium in which Islamists are forced to rethink idea of an allegedly “authentic” Islamic morality and the legitimacy of international norms.