Norman Geisler is a Christian systematic theologian, philosopher, and apologist. He is the co-founder of two non-denominational Evangelical seminaries (Veritas Evangelical Seminary and Southern Evangelical Seminary.) He holds a Ph.D. in philosophy from Loyola University and is well known for his scholarly contributions to the subjects of classical Christian apologetics, systematic theology, the history of philosophy, philosophy of religion, the creationism and evolution debate, Calvinism, Roman Catholicism, biblical inerrancy, Bible difficulties, ethics, and more. He is the author, coauthor, or editor of over 90 books and hundreds of articles.