He played a central role in the Reconstructionist movement. He edited its journal, The Reconstructionist,[2] and, alongside Kaplan and Ira Eisenstein, edited The New Haggadah (1941), The Sabbath Prayer Book (1945) and The Reconstructionist Prayer Book (1948). Alongside Jack Cohen, Eisenstein, and Milton Steinberg, he was one of Kaplan's main disciples.
Works
Manual for Teaching Biblical History (1917)
The Future of Judaism in America (1934)
The Future of Judaism in America (1934)
Religion and Humanity (1953)
Religious Humanism: A Jewish Interpretation (1953)