Dynamics of Political Violence examines how violence emerges and develops from episodes of contentious politics. By considering a wide range of empirical cases, such as anarchist movements, ethno-nationalist and left-wing militancy in Europe, contemporary Islamist violence, and insurgencies in South Africa and Latin America, this pathbreaking volume of research identifies the forces that shape radicalization and violent escalation. It also contributes to the process-and-mechanism-based models of contentious politics that have been developing over the past decade in both sociology and political science. Chapters of original research emphasize how the processes of radicalization and violence are open-ended, interactive, and context dependent. They offer detailed empirical accounts as well as comprehensive and systematic analyses of the dynamics leading to violent episodes. Specifically, the chapters converge around four dynamic processes that are shown to be especially germane to radicalization and violence: dynamics of movement-state interaction; dynamics of intra-movement competition; dynamics of meaning formation and transformation; and dynamics of diffusion.