An in-depth study of the militant Islamic Laskar Jihad movement and its links to international Muslim networks and ideological debates. Noorhaidi Hasan examines the rise and fall of Ja'far Umar Thalib, who led the movement and reinterpreted an apolitical Salafi doctrine to justify violent political action. This analysis is grounded in extensive research and interviews with Salafi leaders and activists who supported jihad throughout the Moluccas.