Father Himes’s research interests include ethical issues in war and peace-building, the development of Catholic social teaching, and the role of religion in American public life. He has published on the ethics of U.S. military action in such publications as the Journal for Peace and Justice Studies, Concilium: Human Nature and Natural Law, Theological Studies, and the New Theology Review as well as multiple chapters in edited books. Father Himes’s forthcoming book, Targeted Killing and the Ethics of Drone Warfare, engages the ethical, legal, and political implications of targeted killing, including targeted killing by drone.