Greg L. Bahnsen (September 17, 1948 – December 11, 1995) was an American Reformed philosopher, apologist, and debater. He was a minister in the Orthodox Presbyterian Church and a full-time Scholar in Residence for the Southern California Center for Christian Studies (SCCCS). He is also considered a contributor to the field of Christian apologetics, as he popularized the presuppositional method of Cornelius Van Til. He is the father of David L. Bahnsen, an American portfolio manager, author, and television commentator. Early life and education He was the first born of two sons of Robert and Virginia Bahnsen in Auburn, Washington, and grew up in Pico Rivera, California. In youth he was beset by a number of medical difficulties, the most serious of which was a lifelong platelet problem that made it difficult for him to stop bleeding, a condition similar to hæmophilia. He also had heart trouble which came to light only during his first college admissions medical exam. Raised in the Orthodox Presbyterian Church, he actively participated in religious activities. He first began reading the apologetics of Cornelius Van Til when in high school. While attending Westmont College he began writing for the Chalcedon Foundation of Rousas J. Rushdoony and soon came to admire the latter's strong Calvinistic convictions. In 1970 Bahnsen graduated magna cum laude from Westmont College, receiving his B.A. in philosophy as well as the John Bunyan Smith Award for his overall grade point average. From there he went on to Westminster Theological Seminary in Philadelphia, where he studied under Cornelius Van Til. The two became close friends. When he graduated in May 1973, he simultaneously received two degrees, Master of Divinity and Master of Theology, as well as the William Benton Greene Prize in apologetics and a Richard Weaver Fellowship from the Intercollegiate Studies Institute. His next academic stop was the University of Southern California (USC), where he studied philosophy, specializing in the theory of knowledge. In 1975, after receiving ordination in the Orthodox Presbyterian Church, he became an associate professor of Apologetics and Ethics at Reformed Theological Seminary (RTS) in Jackson, Mississippi. While there, he completed his studies at USC, receiving his Ph.D. in 1978. Bahnsen's four years at RTS were fraught with contention, centered around his particular version of theonomic postmillennialism. Later life One of the original pillars of Christian Reconstruction, Bahnsen was a leading proponent of theonomy, postmillennialism, and presuppositional apologetics. He