Euan Cameron is Henry Luce III Professor of Reformation Church History at Union Theological Seminary, New York and Professor of Religion at Columbia University, New York. His publications include Waldenses: Rejections of Holy Church in Medieval Europe (2000), Interpreting Christian History: The Challenge of the Churches' Past (2005), Enchanted Europe: Superstition, Reason, and Religion, 1250-1750 (2010), and The European Reformation, 2nd Edition (2012).