Abstract This chapter discusses intervention strategies for intrastate violence with emphasis on preventing and mitigating cycles of organized violence. We distinguish three phases of a cycle of violence (intergroup conflict, organized violence, and postviolence), discuss characteristics of each phase, and suggest peace intervention strategies that are particularly well suited for each phase. When discussing the limitations of our perspective and future research directions, we point to the narrow focus of research and practice on peace interventions aimed at promoting the absence of organized violence (i.e., negative peace) without concomitant efforts to promote social justice (i.e., positive peace) and sustainable development. We maintain that durable forms of peace require the application of both negative and positive peace interventions.