Clark Pinnock was Professor Emeritus of Systematic Theology at McMaster Divinity College in Hamilton, Ontario. Widely regarded as one of evangelicalism's most stimulating theologians, he produced several widely discussed books, including The Wideness of God's Mercy and (with four other scholars) The Openness of God. He passed away in August, 2010.

David Basinger is professor of philosophy and ethics at Roberts Wesleyan College in Rochester, New York. He is the author of Divine Power in Process Theism (SUNY) and joint author of the books Reason and Religious Belief: An Introduction to the Philosophy of Religion (Oxford) and Religious Diversity: A Philosophical Assessment (Ashgate).

Richard Rice is professor of religion at Loma Linda University in Loma Linda, California. He is the author of several books, including God's Foreknowledge and Man's Free Will and Reason and the Contours of Faith.

John Sanders (Th.D., University of South Africa) is professor of religion at Hendrix College in Conway, Arkansas. He has edited and written several books, including No Other Name: An Investigation into the Destiny of the Unevangelized. Three of his previous book projects have received a Christianity Today Book Award.

William Hasker (Ph.D., University of Edinburgh) is professor emeritus of philosophy at Huntington College in Huntington, Indiana. His books include Metaphysics: Constructing a World View; God, Time, and Knowledge; Reason and Religious Belief (with Michael Peterson, David Basinger and Bruce Reichenbach); The Openness of God (with Clark Pinnock, Richard Rice, John Sanders and David Basinger); Philosophy of Religion: Selected Readings (edited with Michael Peterson, David Basinger and Bruce Reichenbach); The Emergent Self; Middle Knowledge: Theory and Applications (edited with David Basinger and Eef Dekker) and Providence, Evil and the Openness of God.