Focusing on the relationship between the micro level of perpetrator motivation and the macro level normative discourse, this book offers an in-depth explanation for the perpetration of genocide. It is the first comparative criminological treatment of genocide drawn from original field research, based substantially on the author’s interviews with perpetrators and victims of genocide and mass atrocities, combined with wide-ranging secondary and archival sources. Topics covered include: perpetration in organizations, genocidal propaganda, the characteristics of perpetrators, decision-making in genocide, genocidal mobilization, coping with killing, perpetrator memory and trauma, moral rationalization, and transitional justice.