Complex sentence: His leadership of the Christian "Life and Work" movement in the 1920s has led him to be recognised as one of the principal founders of the ecumenical movement, and he was a close friend of the English ecumenist George Bell.
Split into simpler sentences: His leadership of the Christian "Life and Work" movement in the 1920s has led him to be recognised as one of the principal founders of the ecumenical movement. He was a close friend of the English ecumenist George Bell.