The World Council of Churches (WCC) is a worldwide Christian inter-church organization founded in 1948 to work for the cause of ecumenism. Its full members today include the Assyrian Church of the East, the Oriental Orthodox Churches, most jurisdictions of the Eastern Orthodox Church, the Union of Utrecht, the Lutheran World Federation, the Anglican Communion, the Mennonite churches, the World Methodist Council, the Baptist World Alliance, the World Communion of Reformed Churches, the Pentecostal churches, the Moravian Church and the Malankara Mar Thoma Syrian Church. Notably, the Catholic Church is not a full member, although it sends delegates to meetings who have observer status.

The 1910 World Missionary Conference, or the Edinburgh Missionary Conference, was held on 14 to 23 June 1910. Some have seen it as both the culmination of nineteenth-century Protestant Christian missions and the formal beginning of the modern Protestant Christian ecumenical movement, after a sequence of interdenominational meetings that can be traced back as far as 1854.