How can we understand -- when nonviolent movements will stay nonviolent? When are they likely to break down into violence? In this monograph, Jonathan Pinckney analyzes both what promotes and undermines nonviolent discipline in civil resistance movements. Combining quantitative research on thousands of nonviolent and violent actions with a detailed comparison of three influential cases of civil resistance during the "Color Revolutions", Pinckney's study provides important lessons for activists and organizers on the front lines, as well as for practitioners whose work may impact the outcomes of nonviolent struggles. We learn how repression consistently induces violence, as do government concessions. On the flip side, we see that structuring a campaign in an inclusive and non-hierarchical way is conducive to greater nonviolent discipline.