Peter E. Gordon is the Amabel B. James Professor of History, Faculty Affiliate in the Department of Germanic Languages and Literatures, and Faculty Affiliate in the Department of Philosophy at Harvard University. Espen Hammer is Professor of Philosophy at the College of Liberal Arts of Temple University. He has held professorships at the University of Oslo and the University of Essex. Max Pensky is Professor of Philosophy and co-Director of the Institute for Genocide and Mass Atrocity Prevention at Binghamton University, State University of New York.