Perpetrators of International Crimes
Theories, Methods, and Evidence

Why would anyone commit a mass atrocity such as genocide, crimes against humanity, war crimes, or terrorism? This question is at the core of the multi- and interdisciplinary field of perpetrator studies, a developing field which this book assesses in its full breadth for the first time. Perpetrators of International Crimes analyses the most prominent theories, methods, and evidence to determine what we know, what we think we know, as well as the ethical implications of gathering this knowledge. It traces the development of perpetrator studies whilst pushing the boundaries of this emerging field. The book includes contributions from experts from a wide array of disciplines, including criminology, history, law, sociology, psychology, political science, religious studies, and anthropology. They cover numerous case studies, including prominent ones such as Nazi Germany, Rwanda, and the former Yugoslavia, but also those that are relatively under researched and more recent, such as Sri Lanka and the Islamic State. These have been investigated through various research methods, including but not limited to, trial observations and interviews.

Alette Smeulers is Professor of Criminal Law and Criminology of International Crimes at the University of Groningen. She is a political scientist by training but specialized in the psychology of perpetrators and did her PhD in international criminal law. Her research focuses on the international crimes, the causes of these types of crimes, and the perpetrators of these crimes as well as the international criminal justice system. In her research she takes an inter- and multidisciplinary approach. She has published extensively on these subjects and has presented numerous papers at international conferences and at a wide range of universities in Europe and the United States. Maartje Weerdesteijn is Assistant Professor at VU University Amsterdam and a Researcher at the Center for International Criminal Justice. She obtained a PhD from Tilburg University, Department of Criminal Law, a Master in International Crimes and Criminology from VU University Amsterdam (Cum Laude), and a Bachelor in European Studies from Maastricht University (Cum Laude). In 2014 she was a visiting scholar at Griffith University Australia at the Griffith Asia Institute. Her book The Rationality of Dictators: Towards a more effective implementation of the responsibility to protect was published by Intersentia. Barbora Holá is Associate Professor at VU University Amsterdam and Senior Researcher at the Netherlands Institute for the Study of Crime and Law Enforcement (NSCR). She is co-director of the Center for International Criminal Justice and co-chair of the European Society of Criminology Group on Atrocity Crimes and Transitional Justice. She has an interdisciplinary focus and studies transitional justice after atrocities, in particular (international) criminal trials, sentencing of international crimes, enforcement of internaional sentences, rehabilitation of war criminals, and life after trial at international criminal tribunals. She has published extensively on these subjects and presented at