Potter moved to
Geneva in 1954 to work in the WCC’s youth department, and remained with the WCC until his retirement. He was the chairperson of the
World Student Christian Federation from 1960 to 1968. From 1972 to 1984, he served as the WCC’s General Secretary. He was the first president of WSCF's Centennial Fund. He is considered a leader in world
ecumenism. In a speech on the occasion of his 85th birthday, at the WCC's 9th Assembly at
Porto Alegre, Brazil in February 2006,
Samuel Kobia (then General Secretary of the WCC) remarked, "Great strides were taken by the World Council of Churches under Philip Potter’s leadership; among the most memorable were the development of the theological consensus document
Baptism, Eucharist and Ministry, the continuation of a courageous campaign against
apartheid in
southern Africa and other forms of
racism throughout the world, a vigorous debate on the nature of post-colonial Christian mission, a co-ordinated witness for peace amid East-West tensions and the threat of nuclear annihilation, as well as an exploration of new forms of
spirituality,
worship and
music drawing on the diverse traditions of the churches." In November 2009 the WSCF launched the Philip Potter Fund. This Fund is to support Ecumenical Leadership Formation of young people through the WSCF. In conjunction with the WSCF event in November the WCC renamed its library The Philip Potter Library. ==Personal life==