Eric A. Johnson is Professor of Modern History at Central Michigan University and has previously held professorships at the University of Cologne and the University of Strathclyde. His research concentrates on violence in modern history, Nazi Germany, and the Holocaust. He has held fellowships at the Institute for Advanced Study in Princeton, the Netherlands Institute for Advanced Study, the Fulbright and Alexander von Humboldt Foundations, the National Endowment for the Humanities, and the National Science Foundation. He is the author of Urbanization and Crime (1995), the co-author of What We Knew: Terror, Mass Murder and Everyday Life in Nazi Germany (2005) and author of Nazi Terror: The Gestapo, Jews, and Ordinary Germans (2000).

Ricardo D. Salvatore is Professor of Modern History at the Universidad Torcuato Di Tella in Buenos Aires, Argentina. His most recent books are Subalternos, Derechos y Justicia Penal: Ensayos de historia social y cultural argentina 1829-1940 (2010) and Wandering Paysanos: State Order and Subaltern Experience in Buenos Aires during the Rosas Era (2003). He is co-editor of Crime and Punishment in Latin America: Law and Society since Late Colonial Times (2001).

Pieter Spierenburg is Professor of Historical Criminology at Erasmus University Rotterdam, the Netherlands. His research focuses on crime, law, and violence in early modern history, and he has published, among other books, A History of Murder: Personal Violence in Europe from the Middle Ages to the Present (Polity, 2008), Written in Blood: Fatal Attraction in Enlightenment Amsterdam (2004) and, most recently, Violence and Punishment: Civilizing the Body through Time (Polity, 2013).