Daniel W. Drezner is professor of international politics at the Fletcher School of Law and Diplomacy, Tufts University, and a nonresident senior fellow at the Brookings Institution. Henry Farrell is the SNF Agora Professor at the Johns Hopkins School of Advanced International Studies. Abraham L. Newman is a professor in the Edmund A. Walsh School of Foreign Service and Government Department, Georgetown University, and director of the Mortara Center for International Studies.