David is a Professor of Philosophy at George Washington University. Hispublications include Taking Animals Seriously (Cambridge University Press, 1996)and Human Identity and Bioethics (Cambridge University Press, 2005). His research has been supported by fellowships from the National Endowment for theHumanities, the American Council of Learned Societies, and the National Institutesof Health.
Thomas A. Mappes holds a B.S. in chemistry from the University of Dayton and a Ph.D. in philosophy from Georgetown University. He is professor of philosophy at Frostburg State University, where he has taught since 1973. He is the coeditor (with Jane S. Zembaty) of Social Ethics: Morality and Social Policy (McGraw-Hill, 4/e, 1992) and his published work appears in journals such as American Philosophical Quarterly and Kennedy Institute of Ethics Journal. In 1985, the Frostburg State University Foundation presented him with the Faculty Achievement Award for Teaching.