My chapter studies the interweaving theologies of mission of Max Warren and John V. Taylor, who, as successive General Secretaries of the CMS, had such a profound influence on the worldwide Anglican Communion and in particular its inter-faith relations. It was published originally in Kevin Ward and Brian Stanley (eds), The Church Mission Society and World Christianity, 1799-1999 (Eerdmans, 2000) and then in Graham Kings, Nourishing Mission: Theological Settings (Brill, 2022).