This introduction lays out the book’s aims and its approach to studying reparations. The book uses the notion of ‘practices’ as an analytical lens to make visible forms of social actions that together and simultaneously enable and constrain reparations. The book examines these practices through four phases of the ‘social life’ of reparations: norm-making, engagement with conflict-affected populations, as well as adjudication and implementation of reparations. Accompanying the introduction is a brief background to the case studies that are at the core of this book, namely the International Criminal Court (ICC) and the Extraordinary Chambers in the Courts of Cambodia (ECCC). The book focuses on the first two cases at each court that have reached the reparations stage: at the ICC, the cases against Thomas Lubanga and Germain Katanga relating to the situation in Ituri, Democratic Republic of Congo; and at the ECCC, Cases 001 and 002 involving senior leaders of the Khmer Rouge and those most responsible for crimes committed in Cambodia during the 1970s.