The Federal Council of the Churches of Christ in America has been the foremost cooperative agency since 1905. A Disciple suggested that name, and Disciples had a part in its organization and have been well represented in its leadership. Jesse Bader has been at the head of its department of evangelism for many years. Herbert L. Willett was in charge of its Midwestern office for a considerable period. Edgar DeWitt Jones has served as its president. The Disciples have entered heartily into cooperative educational work in foreign missions and into comity arrangements both at home and abroad for the allotment of fields and the distribution of forces to prevent duplication and competition. A Disciple missionary, Samuel Guy Inman, has been the leading spirit in the Committee on Cooperation in Latin America. The Interchurch World Movement, which aimed at a revival of Christian work and the strengthening of all Christian institutions immediately after World War I, was overambitious and became a costly fiasco. Disciples shared in this, too, and paid their part of the staggering deficit. What is more explicitly called the Ecumenical Movement began with a World Conference on Foreign Missions, at New York City in 1900. This led to a similar conference in Edinburgh in 1910. The Disciples were not represented in the organization or on the program of either of these. In the minds of the promoters of these conferences, they were still an unknown people, or a minor sect. Some Disciples attended, however, as unofficial observers. Beginning with the problem of unity in missions, the Ecumenical Movement expanded to become “Life and Work” (Stockholm, 1925, and Oxford, 1937) and “Faith and Order” (Lausanne, 1927, and Edinburgh, 1937). The problems of Christianity in relation to other world religions were studied at the Jerusalem Conference, 1930, and those of the “younger churches” of the mission lands at Madras, 1939. In all these ecumenical gatherings, the Disciples have had a recognized place and have taken an active part. They have also recorded their adherence to the World Council of Churches, which grew out of the Oxford and Edinburgh conferences of 1937.