Dr. Teofilo F. Ruiz is Professor of History at the University of California, Los Angeles. A student of Joseph R. Strayer, Dr. Ruiz earned his Ph.D. from Princeton University. Prior to taking his post at UCLA, he held teaching positions at Brooklyn College, the City University of New York Graduate Center, the University of Michigan, the School of Advanced Studies in Social Sciences in Paris, and Princeton University-as the 250th Anniversary Visiting Professor for Distinguished Teaching. In 1994-1995, the Carnegie Foundation selected Professor Ruiz as one of four Outstanding Teachers of the Year in the United States. Professor Ruiz has been the recipient of fellowships from the National Endowment for the Humanities, the Andrew W. Mellon Foundation, the Institute for Advanced Study at Princeton, and the American Council of Learned Societies. Dr. Ruiz has published six books, more than 40 articles, and more than 100 reviews and smaller articles in national and international scholarly journals. His Crisis and Continuity, Land and Town in Late Medieval Castile was awarded the Premio del Rey Prize by the American Historical Association.