Perpetrators and Perpetration of Mass Violence? an Introduction Section I: Theorising Perpetrators 1 Thinking beyond Perpetrators, Bystanders, Heroes: a Typology of Action in Genocide 2 Violence as Action 3 Theorizing Ideological Diversity in Mass Violence Section II: Motivations and Dynamics 4 Perpetrators? Political Civil Servants in the Third Reich 5 The Normality of Going to War: Aspects of Symbolic Violence in Participation and Perpetration in Civil War 6 "We No Longer Pay Heed to Humanitarian Considerations": Narratives of Perpetration in the Wehrmacht, 1941-44 7 Gender and Genocide: Assessing Differential Opportunity Structures of Perpetration in Rwanda 8 Perpetrators of Sexual Violence in Armed Conflict 9 Cross-Border Perpetrator Recruitment in the Ivorian Civil War: The Motivations and Experiences of Young Burkinable Men in the Forces Nouvelles Rebel Movement 10 Judenjagd: Reassessing the Role of Ordinary Poles as Perpetrators in the Holocaust 11 Is a Comparative Theory of Perpetrators Possible?