Ruth Mazo Karras is Professor of History at the University of Minnesota and author of From Boys to Men: Formations of Masculinity in Later Medieval Europe, also published by the University of Pennsylvania Press. Joel Kaye is Professor of History at Barnard College and author of Economy and Nature in the Fourteenth Century: Money, Market Exchange, and the Emergence of Scientific Thought. E. Ann Matter is Associate Dean for Arts and Letters in the School of Arts and Sciences and William R. Kenan, Jr. Professor of Religious Studies at the University of Pennsylvania. She is the author of The Voice...