Research shows that repression can lead to both radicalization and deradicalization. When does it drive groups to pick up arms, and under what conditions does it foster disengagement from violence? To answer these questions, it is important to trace tactical changes over time, and to parse the factors that push groups toward or away from violence. Through an examination of four case studies—the Muslim Brotherhood and Al-Gama'a al-Islamiya'a in Egypt, and Darul Islam and Jemaah Islamiyaa in Indonesia—Ioana Emy Matesan establishes a framework for understanding what leads groups to escalate towards violence, or to renounce it. Matesan breaks down how escalation occurs into ideological, organizational, and behavorial escalation, giving us a nuanced and systematic approach to examining the complex nature of Islamist groups and providing a structure for analyzing other social groups that engage in violent tactics.

The Violence Pendulum: Tactical Change in Islamist Groups in Egypt and Indonesia (Oxford UP, 2020).

Ioana Emy Matesan is Assistant Professor of Government and Tutor in the College of Social Studies at Wesleyan University.

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