The complex relationship between violence and nonviolence in social movements. We are living in a time of uprisings. Across the world and all around us, movements are taking to the streets and challenging established power. These uprisings routinely involve moments of physical confrontation--burning vehicles and barricades, vandalism, projectiles thrown at police, and scuffles between protestors and authorities. Yet the Left has struggled to incorporate rioting into theories of change, remaining stuck in the recurring debates about violence and nonviolence.