Berkley Center

Nicole Bibbins Sedaca is a professor of the practice of international relations and serves as the concentration chair for global politics and security in the Master of Science in Foreign Service Program in the Georgetown University Walsh School of Foreign Service. She served for 10 years in the United States Department of State, working on democracy promotion, human rights, human trafficking, religious freedom, refugees, women's issues, and counterterrorism.

Judd Birdsall is assistant professor of the practice in the Department of Theology and Religious Studies at Georgetown University, where he is also a senior fellow at the Berkley Center for Religion, Peace, and World Affairs and the project director of the Transatlantic Policy Network on Religion and Diplomacy (TPNRD). In addition, he is a senior advisor on the religion and inclusive societies team at the United States Institute of Peace. From 2011 to 2020 Birdsall was based at Cambridge University, where he earned his Ph.D., founded a research center on religion and international studies, and served as an affiliated lecturer in the Department of Politics and International Studies. Prior to his time at Cambridge, he served in the U.S. State Department’s Office of International Religious Freedom and on the Secretary of State’s Policy Planning Staff. Birdsall is the editor of Religion & Diplomacy, and his work has appeared in the Washington Post, Foreign Policy, Guardian, Huffington Post, Christianity Today, and Religion & Politics. He is also a senior editor and a frequent contributor at the Review of Faith & International Affairs.

Rev. David Hollenbach, S.J., is the Pedro Arrupe Distinguished Research Professor in the Walsh School of Foreign Service; a senior fellow at the Berkley Center for Religion, Peace, and World Affairs; and an affiliated professor in the Department of Theology and Religious Studies at Georgetown University. His teaching and research deal with human rights, religious and ethical responses to humanitarian crises, and religion in political life from the standpoint of Catholic social thought, theology, and the social sciences. His books include Human Rights in a Divided World: Catholicism as a Living Tradition (2024), Humanity in Crisis: Ethical and Religious Response to Refugees (2019), Driven from Home: Protecting the Rights of Forced Migrants (2010) The Global Face of Public Faith: Politics, Human Rights, and Christian Ethics (2003), and The Common Good and Christian Ethics (2002). He has taught often at Hekima University College in Nairobi, Kenya, and he collaborates with Jesuit Refugee Service. From 2020 to 2022 he is a distinguished research associate with the Kellogg Institute for International Studies at the University of Notre Dame. Hollenbach is also a research associate with the Jesuit Center for Theological Reflection in Zambia. Hollenbach is a member of the Working Group on Displaced Persons and Hospitality to the Stranger, part of the Culture of Encounter Project.

Michael Kessler is executive director of the Berkley Center for Religion, Peace, and World Affairs at Georgetown University, a professor of the practice of moral and political theory in the Department of Government, and an adjunct professor of law at Georgetown Law. Kessler’s research and writing focus on theology, philosophical and religious ethics, and social, political, and legal theory. He is interested in problems of law and religion, both globally and in the U.S. constitutional context. Kessler is the author of several edited volumes, including The Oxford Handbook of Political Theology, co-edited with Shaun Casey (Oxford University Press, forthcoming); Political Theology for a Plural Age (Oxford University Press, 2013); and Mystics: Presence and Aporia, co-edited with Christian Sheppard (University of Chicago Press, 2003). He also wrote “Engaging Religion in U.S. Foreign Affairs,” a chapter in the Companion to Religion and Politics in the United States (Wiley-Blackwell, 2016). Kessler is a member of the Working Group on Displaced Persons and Hospitality to the Stranger, part of the Culture of Encounter Project.

Mark P. Lagon is chief policy officer at Friends of the Global Fight Against AIDS, Tuberculosis and Malaria. He is also adjunct professor, Centennial Fellow, and Distinguished Senior Scholar in Georgetown’s School of Foreign Service. Lagon previously was president of Freedom House and served as U.S. ambassador-at-large, directing the Office to Monitor and Combat Trafficking in Persons.