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.

Christianity is an Abrahamic monotheistic religion based on the life and teachings of Jesus Christ. It is the world's largest and most widespread religion with roughly 2.4 billion followers, comprising around 31.2% of the world population. Its adherents, known as Christians, are estimated to make up a majority of the population in 157 countries and territories. Christians believe that Jesus Christ is the Son of God, whose coming as the Messiah was prophesied in the Hebrew Bible and chronicled in the New Testament.