Born: 1947, Grand Haven, Michigan.
Diephouse was educated at Calvin College, Grand Rapids, Michigan (BA), and Princeton University, New Jersey (PhD).
He taught history at Rutgers University, New Brunswick, New Jersey (1974–76). In 1976, he became professor of history at Calvin College, and was a visiting instructor at Calvin Theological Seminary.
He also served Calvin College as an academic dean and in several other administrative positions, and retired from teaching in 2013.
He served on worship committees for the Church of the Servant in Grand Rapids, and for the Christian Reformed Church.
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