Mark Sagoff has published widely in journals of law, philosophy, and the environment. His most recent books are The Economy of the Earth, 2nd Edition (Cambridge University Press, 2008) and Price, Principle, and the Environment (Cambridge University Press, 2004). He was named a Pew Scholar in Conservation and the Environment in 1991 and awarded a Fellowship at the Woodrow Wilson International Center for Scholars in 1998. He is a Fellow of the American Association for the Advancement of Science and of the Hastings Center. The Breakthrough Institute named Sagoff as one of its six Senior Fellows of 2012, calling him, "America's most trenchant environmental philosopher." Sagoff has an A.B. from Harvard and a Ph.D. (Philosophy) from Rochester, and has taught at Princeton, the University of Pennsylvania, the University of Wisconsin (Madison), and Cornell. He served as the director of the Institute for Philosophy and Public Policy from 1988-1995, and 2006-2013. He is currently a Professor of Philosophy at George Mason University. Before coming to Mason, he directed the Institute for Philosophy and Public Policy at the University of Maryland, College Park.