Steven Ratner is the Bruno Simma Collegiate Professor of Law at the University of Michigan Law School. His research addresses a range of public international law issues, including the normative orders concerning armed conflict, accountability for human rights violations, territorial borders and ethnic conflict, implementation of peace accords, and regulation of foreign investment. For the last ten years he has written and lectured extensively on the intersection of philosophical ethics and international law. He was a member of the UN Secretary-General’s Group of Experts on Cambodia in 1998-99 and the Secretary-General’s Panel of Experts on Accountability in Sri Lanka in 2010-11, and has also worked as a legal consultant at the ICRC and the OSCE High Commissioner on National Minorities. He is a member of the State Department’s Advisory Committee on International Law and an Adviser to the American Law Institute on the new Restatement of Foreign Relations Law, and has been a member of the Board of Editors of the American Journal of International Law. His most recent book is The Thin Justice of International Law: A Moral Reckoning of the Law of Nations (OUP, 2015).