Norman L. Geisler (1932-2019) cofounded Southern Evangelical Seminary and wrote over 100 books, including his four-volume Systematic Theology. He taught at the university and graduate level for nearly forty years and spoke at conferences worldwide.

Chad V. Meister (PhD, Marquette University) is professor of philosophy and theology at Bethel College in Indiana. He formerly led the Defenders Ministry at Willow Creek Community Church. He is married to Tammi and they have two teenage sons.

E. Calvin Beisner (PhD, University of St. Andrews) is a spokesman for the Cornwall Alliance for the Stewardship of Creation and an author and speaker on the application of the biblical worldview to economics, government, and environmental policy. He is a ruling elder in the Orthodox Presbyterian Church and has written over ten books and is a frequent guest on radio and television programs.

J. P. Moreland (PhD, University of Southern California) is distinguished professor of philosophy at Biola University. He is an author of, contributor to, or editor of over ninety books, including The Soul: How We Know It's Real and Why It Matters.

Louis Markos (PhD, University of Michigan) is professor of English and scholar in residence at Houston Baptist University. He is the author of twelve books and has published over 120 book chapters, essays, and reviews in various magazines and journals. He lives in Houston with his wife, Donna, and their two children.

Scott Klusendorf is the president of Life Training Institute, where he trains pro-life advocates to persuasively defend their views. A passionate and engaging platform speaker, Scott's pro-life presentations have been featured by Focus on the Family, Truths That Transform, and American Family Radio. Scott is a graduate of UCLA and the author of Pro-Life 101.