During that time, Erdman was elected the Moderator of the General Assembly of the Presbyterian Church in the United States of America in 1925, and also served as pastor of First Presbyterian Church in Princeton, New Jersey, from 1924 to 1934.
[2] Erdman was a major voice for tolerance toward deviation from the Westminster Standards, in opposition to J. Gresham Machen, which led to the reorganization of the seminary and some faculty breaking off from Princeton to form Westminster Theological Seminary in 1929.
[4] Erdman died in 1960 and is buried in the Princeton Cemetery of the Nassau Presbyterian Church.
[5] Erdman was the author of over thirty popular biblical commentaries and books of pastoral theology.
Two of his essays entitled "The Coming of Christ" and "The Church and Socialism" were included in The Fundamentals.