Buchman had had a conversion experience in an evangelical chapel in Keswick, England, when he attended a decisive sermon by Jessie Penn-Lewis in the course of the 1908 Keswick Convention. Later, but to him as result of that experience, he would, when resigning a part-time post at Hartford Seminary in 1921, found a movement called "First Century Christian Fellowship". By 1928 the Fellowship had become known as "The Oxford Group". "The Oxford Group" enjoyed wide popularity and success in the 1930s. In 1932 the Archbishop of Canterbury, Cosmo Lang, in summing up a discussion of "The Oxford Groups" with his Diocesan Bishops, said, "There is a gift here of which the church is manifestly in need." Two years later the Archbishop of York, William Temple paid tribute to "The Oxford Groups" which "are being used to demonstrate the power of God to change lives and give to personal witness its place in true discipleship".In 1938, the "Oxford Group" proclaimed "a need for "moral re-armament"" and that expression became the movement's new name. Buchman headed the Moral Re-Armament for 23 years until his retirement in 1961. In 2001 the movement was renamed Initiatives of Change.