Robert B. Baker is William D. Williams professor of philosophy at Union College, New York and director of the Union Graduate College-Mount Sinai School of Medicine Bioethics Program. Founding chair of the History of Medical Ethics Affinity Group of the American Society of Bioethics and Humanities, Baker is the author and editor of numerous articles and books, including the award-winning American Medical Ethics Revolution (with Arthur L. Caplan, Linda L. Emanuel and Stephen R. Latham, 1999). A four-time recipient of grants from the National Endowment for the Humanities, he currently co-directs a grant from the National Institutes of Health Fogarty International Center to train research ethicists in transition societies in Central and Eastern Europe. Laurence B. McCullough is Professor of Medicine and Medical Ethics and Associate Director for Education in the Center for Medical Ethics and Health Policy at Baylor College of Medicine in Houston, Texas. He has published ten books and more than 375 scholarly articles and book chapters on the history of medical ethics, the ethics of the major medical specialties, research ethics, and the philosophy of Leibniz. His research has been supported by grants and fellowships from the National Endowment for the Humanities, the National Institutes of Health, and the American Council of Learned Societies.