The Theological Discussion Group, meeting twice yearly in weekend retreat initially at Yale University, included Reinhold Niebuhr, Richard Niebuhr, Paul Tillich, Henry Van Dusen, James Luther Adams, Georgia Harkness and many other leading Christian thinkers. Papers were presented and critiqued, and issues concerning the evolution of Christianity and the modern world discussed. The collection contains typescript addresses presented to the Theological Discussion Group, as well as a small amount of administrative correspondence, including lists of members.