Phillip E. Johnson taught law for more than thirty years at the University of California--Berkeley where he is professor emeritus. He is recognized as a leading spokesman for the intelligent design movement, and is the author of many books, including Darwin on Trial, Reason in the Balance and Defeating Darwinism by Opening Minds.

Sarah Sumner (Ph.D., Trinity Evangelical Divinity School) is dean of the A. W. Tozer Theological Seminary in Redding, California. She is also an author and speaker who travels both nationally and internationally to address church congregations and institutions of Christian higher education. In addition, she is a consultant who addresses businesses and nonprofits on the subject of leadership and organizational health. Dr. Sumner is the first woman to earn a Ph.D. in Systematic Theology from Trinity Evangelical Divinity School. Her formal training includes a B.A. from Baylor in Education, an M.A. in Theology from Wheaton College, an M.Div equivalent from Trinity, and an M.B.A. from Azusa Pacific University. For nine years Sumner served as a core teaching pastor at New Song Church in San Dimas, California. For almost thirteen years she worked primarily as a faculty member in the Graduate School of Theology at Azusa Pacific University.