Dr. Tim Muelhoff (Ph.D. University of North Carolina at Chapel Hill) is a professor of communication at Biola University in La Mirada, CA where he teaches classes on conflict resolution, persuasion, and rhetoric. He is the co-director of the Winsome Conviction Project and has written extensively in the area of cultural engagement and conflict resolution including Winsome Conviction, I Beg to Differ, Authentic Communication and Winsome Persuasion.
Dr. Rick Langer is the Director of the Office of Faith and Learning at Biola University. He is the co-author of Winsome Persuasion and Winsome Conviction, and his academic writing applies theology to a variety of disciplines including business leadership, disability, suffering, bioethics, and vocation. He has served as a pastor and on the boards of various Christian and community organizations. He has also worked with the national organization Braver Angels, moderating workshops that bring together right and left-leaning citizens to discuss their conflicting political convictions.