John-Michael Arnold is a Ph.D. candidate at Princeton University’s Woodrow Wilson School of Public and International Affairs, where he is a Bradley Fellow and Center for International Security Studies Fellow. The working title of John-Michael’s dissertation is Other People’s Boots on the Ground: Lethal Assistance and the American Ways of War. The dissertation explores the United States provision of lethal assistance—weapons and equipment; military advice and training; and combat support—to other states and non-state groups. Prior to enrolling at Princeton, John-Michael worked for three years as special assistant to the president of the Brookings Institution. He holds a master’s degree in international relations from Yale University and a B.A. in Philosophy, Politics and Economics (PPE) from the University of Oxford.