Church Unity and the Papal Office: An Ecumenical Dialogue on John Paul II's Encyclical Ut Unum Sint

Carl E. Braaten (1929–2023) was an American Lutheran theologian. He earned his doctoral degree from Harvard Divinity School, where he studied under Paul Tillich. He served as professor of systematic theology at the Lutheran School of Theology in Chicago for nearly thirty years. In addition to teaching, Braaten cofounded and edited the journal Dialog, cofounded the journal Pro Ecclesia, and cofounded the Center for Catholic and Evangelical Theology. His many publications include Principles of Lutheran Theology; Mother Church: Ecclesiology and Ecumenism; Sin, Death, and the Devil; and The Strange New Word of the Gospel. 

Robert W. Jenson (1930–2017) was a senior scholar for research at the Center of Theological Inquiry in Princeton, New Jersey. He was also cofounder and associate director of the Center for Catholic and Evangelical Theology and cofounder and coeditor of the journal Pro Ecclesia. He was renowned for his work on ecumenical, systematic, and Trinitarian theology.