Norman Leo Geisler (July 21, 1932 – July 1, 2019) was an American Christian systematic theologian, philosopher, and apologist. He was the co-founder of two non-denominational evangelical seminaries: Veritas International University and Southern Evangelical Seminary.

Education and Contributions
Geisler held a Ph.D. in philosophy from Loyola University and made scholarly contributions to the subjects of classical Christian apologetics, systematic theology, the history of philosophy, philosophy of religion, Calvinism, Roman Catholicism, Biblical inerrancy, Bible difficulties, ethics, and more. He authored, coauthored, or edited over 90 books and hundreds of articles.

Notable Achievements
As one of the primary architects of the Chicago Statement on Biblical Inerrancy, Geisler was well noted within the United States evangelical community for his staunch defense of Biblical inerrancy.