Andrew Joseph Christiansen SJ (February 20, 1945 – April 6, 2022) was an American Jesuit priest and author. He was Distinguished Professor of Ethics and Human Development at the Georgetown University Walsh School of Foreign Service, a senior fellow at the Berkley Center for Religion, Peace, and World Affairs, and the former editor-in-chief of the Jesuit magazine America. His areas of research included nuclear disarmament, nonviolence and just peacemaking, Catholic social teaching, and ecumenical public advocacy. Everyone knew him as Drew, not Andrew, and he used it for authorship and in official documents.