Sypsis: This is the second volume of A History of the Ecumenical Movement covering the period from 1517 through 2000. The World Council of Churches has taken the lead in selecting editors and writers for these three volumes. The aim has been to provide a systematic survey of the churches' quest for unity in faith and action during the nearly five centuries under review. Volume 2 (1948-1968) first appeared in 1970. It covers the history of the World Council of Churches from its first assembly at Amsterdam to its fourth assembly at Uppsala, Sweden; analyzes the development of regional ecumenical organizations; and recounts the impact of the Second Vatican Council on the ecumenical witness of the Roman Catholic Church. Contributors include Lesslie Newbigin, Vasil T. Istavridis, Eugene Carson Blake, Hans-Ruedi Weber, Lukas Vischer, and Hans Jochen Margull. Editor Biography: Harold C. Fey (1898-1990), a minister of the Christian Church (Disciples of Christ) in the USA, served for twenty-four years on the staff of The Christian Century, completing his tenure as editor of that Chicago-based journal from 1956 to 1964. During his career, he also taught at Union Theological Seminary in Manila and was executive Secretary of the Fellowship of Reconciliation.