Mark Osiel's writings seek to show how legal responses to mass atrocity can be improved by understanding its organizational dynamics, as revealed through comparative historical analysis. His writings have inspired several conferences and are assigned at many leading universities in North America and Western Europe, in a number of fields. He lives in The Hague, where he is director of public international law programs at the T.M.C. Asser Institute, a think tank associated with the University of Amsterdam. His books include Mass Atrocity, Collective Memory & the Law (1997), Obeying Orders: Atrocity, Military Discipline, and the Law of War (1999), Mass Atrocity, Ordinary Evil, and Hannah Arendt: Criminal Consciousness in Argentina's Dirty War (2002), and The End of Reciprocity: Terror, Torture & the Law of War (2009). Osiel lectures widely on humanitarian law, both abroad and at the U.S. war colleges. He regularly consults to international organizations and governments in post-conflict societies on issues of transitional justice. His articles have appeared in the Harvard Law Review, Columbia Law Review, California Law Review, Pennsylvania Law Review, Human Rights Quarterly, Law & Social Inquiry, and Representations, among others. Osiel has been a visiting Fellow at Cambridge University, Harvard's Kennedy School of Government, the London School of Economics, as well as universities in Argentina, Brazil, France, and India (as a Fulbright lecturer).