J. Bryan Hehir is the Parker Gilbert Montgomery Professor of the Practice of Religion and Public Life at Harvard's Kennedy School of Government and was formerly the president and CEO of Catholic Charities U.S.A. Michael Walzer is a leading American political theorist and a professor of social science at the Institute for Advanced Study in Princeton, N.J. He is the author of several books, including Just and Unjust Wars. Louise Richardson serves as the executive dean of the Radcliffe Institute for Advanced Study at Harvard University and is an expert in international terrorism and defense policy. Shibley Telhami is Anwar Sadat Professor for Peace and Development at the University of Maryland and a non-resident senior fellow at the Saban Center for Middle East Policy at the Brookings Institution. He is the author of numerous books, including the national bestseller The Stakes (Westview). Charles Krauthammer is a Pulitzer Prize-winning syndicated columnist at the Washington Post. He contributes frequently to Time Magazine, The Weekly Standard, The New Republic, and The National Interest. James M. Lindsay is vice president and director of studies of the Council on Foreign Relations, where he holds the Maurice R. Greenberg Chair. He was previously deputy director and senior fellow in Foreign Policy Studies at the Brookings Institution. His books include Agenda for the Nation (Brookings 2003) and Defending America: The Case for Limited National Missile Defense (Brookings 2001). In 1996-97, Lindsay was director for global issues and multilateral affairs on the National Security Council staff.