Kristin Shrader-Frechette is distinguished research professor in philosophy and in environmental sciences and policy at the University of South Florida. She holds degrees in mathematics, physics, and philosophy. She is the author of numerous books, including Ethics of Scientific Research (Rowman & Littlefield, 1994). Laura Westra is professor emerita of philosophy at the University of Windsor and the author or editor of numerous books, including An Environmental Proposal for Ethics (Rowman & Littlefield, 1994), Faces of Environmental Racism (Rowman & Littlefield, 1995), Perspectives on Ecological Integrity (Kluwer), The Greeks and the Environment (Rowman & Littlefield, 1997) and Technology and Values (Rowman & Littlefield, 1998). Bill Lawson is professor of philosophy at Michigan State University.