PhD, King's College, University of London, 1999 MPhil, Medieval History, Jesus College, University of Cambridge, 1991 BA (Hons), Medieval and Modern History, King's College, University of London, 1989

Medieval Europe, Carolingian Civilization. Associate Professor and Richard A. & Sara Page Mayo N.E.H. Distinguished Teaching Professor is author of Peaceful Kings. Peace, Power and the Early Medieval Political Imagination and numerous articles on medieval historical topics.