Leopoldo J. Prieto López, PhD (Philosophy, 1999, Ateneo Pontificio Regina Apostolorum in Rome, with university degrees in Law and Theology), is Professor of Philosophy at the Universidad Francisco de Vitoria. His main research interests are the history of modern philosophy and the history and philosophy of science.José Luis Cendejas Bueno, PhD (Economics, 2001, Universidad Autónoma de Madrid), is lecturer and researcher at the Universidad Francisco de Vitoria. He has published on the economic thought of Spanish Scholasticism and its influence on later European thought.