Between 1980 and 1994, Peru endured a bloody internal armed conflict, with some 69,000 people killed in clashes involving two insurgent movements, state forces, and local armed groups. In 2003, a government-sponsored “Truth and Reconciliation Committee” reported that the conflict lasted longer, affected broader swaths of the national territory, and inflicted higher costs in both human and economic terms than any other conflict in Peru’s history. Of those killed, 75 percent were speakers of an indigenous language, and almost 40 percent were among the poorest and most rural members of Peruvian society. These unequal impacts of the violence on the Peruvian people revealed deep and historical disparities within the country. This collection of original essays by leading international experts on Peruvian politics, society, and institutions explores the political and institutional consequences of Peru’s internal armed conflict in the long 1980s. The essays are grouped into sections that cover the conflict itself in historical, comparative, and theoretical perspectives; its consequences for Peru’s political institutions; its effects on political parties across the ideological spectrum; and its impact on public opinion and civil society. This research provides the first systematic and nuanced investigation of the extent to which recent and contemporary Peruvian politics, civil society, and institutions have been shaped by the country’s 1980s violence.