Peter J. Leithart (PhD, University of Cambridge) is president of Theopolis Institute in Birmingham, Alabama and teacher at Trinity Presbyterian Church. Formerly, he was an adjunct senior fellow of theology at New Saint Andrews College in Moscow, Idaho. He is the author of many books including Defending Constantine, Traces of the Trinity, and Gratitude: An Intellectual History. He is a blog writer and columnist for firstthings.com, and he has published articles in many periodicals, both popular and academic. Ordained in the Communion of Reformed Evangelical Churches (CREC), Leithart pastored Reformed Heritage Presbyterian Church (now Trinity Presbyterian Church) in Birmingham, Alabama, and Trinity Reformed Church in Moscow, Idaho. He and his wife, Noel, have ten children and fifteen grandchildren.