Norman Leo Geisler (July 21, 1932 – July 1, 2019) was an American Christian systematic theologian and philosopher. He was the co-founder of two non-denominational evangelical seminaries (Veritas International University and Southern Evangelical Seminary). One of the primary architects of the Chicago Statement on Biblical Inerrancy, Geisler was well noted within the United States evangelical community for his stalwart defense of Biblical inerrancy.