Anglican and Protestant traditions are recipients of the ecumenical achievements of the twentieth century. This has borne fruit in the interest in doctrines of theosis. Across denominational lines, doctrines of theosis are being constructed in ways that remain faithful to the central defining dogmas and practices of each tradition. These traditions utilize sophisticated methods of theological retrieval to look backwards before moving forwards. A new generation of scholars is now publishing significant works of constructive theology in which theosis finds a central place. More work is yet to be done, and the ecumenical potential theosis offers is yet to be fully realized, but the signs are healthy. Anglican, Reformed, Lutheran, Wesleyan, Pentecostal, Baptist, and Anabaptist voices are brought to the fore in a historical survey of representative theologians of theosis in these various Christian traditions since the middle of the twentieth century. On the basis of this study, several critical observations will be offered before making a series of recommendations for the future of theosis talk within Protestantism globally.