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Bryan Norton is Distinguished Professor Emeritus in Philosophy and Policy in the School of Public Policy, Georgia Institute of Technology, His current research concentrates on sustainability theory, on problems of scale in the formulation of environmental problems, and the theory and practice of adaptive management, with special emphasis on methods to evaluate environmental change. His latest book, Sustainable Values, Sustainable Change: A Guide to Environmental Decision Making, was published by the University of Chicago Press in 20015. He is also the author of Why Preserve Natural Variety? (Princeton University Press, 1987), Toward Unity Among Environmentalists (Oxford University Press, 1991), Searching for Sustainability (Cambridge University Press, 2003), and Sustainability: A Philosophy of Adaptive Ecosystem Management (University of Chicago Press, 2005). Norton has contributed to journals in several fields, including Environmental Psychology, and has served on the Environmental Economics Advisory Committee of the US EPA Science Advisory Board, and two terms as a member of the Governing Board of the Society for Conservation Biology. He was a member of the Board of Directors of Defenders of Wildlife from 1994-2000.