William Lane Craig (born August 23, 1949) is an American analytic philosopher and Christian theologian. He holds faculty positions at Talbot School of Theology (Biola University) and Houston Baptist University. Craig has updated and defended the Kalam Cosmological Argument for the existence of God. He has also published work where he argues in favor of the historical plausibility of the resurrection of Jesus. His study of divine aseity and Platonism culminated with his book God Over All. Craig has debated the existence of God with public figures such as Sam Harris, Christopher Hitchens, Lawrence M. Krauss and A. C. Grayling.