Arthur L. Caplan, Ph.D., Emmanuel and Robert Hart Professor of Bioethics; Chair, Department of Medical Ethics; Director, Center for Bioethics, University of Pennsylvania

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Wendy Wagner, Thomas O. McGarity, E. Donald Elliott, Christopher Schroeder. Moderator: Jonathan Adler

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Daniel Schrag, Department of Earth and Planetary Sciences, Harvard University. Discussant: Dale Jamieson, Environmental Studies Program, New York University

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Speaker: Robert O. Keohane, Professor of International Affairs, Princeton University. Discussant: Charles R. Beitz, Department of Politics, Princeton University

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Speaker: Martin Bunzl, Department of Philosophy, Rutgers University. Discussant: Michael Oppenheimer is the Albert G. Milbank Professor of Geosciences and International Affairs in the Woodrow Wilson School and the Department of Geosciences at Princeton University.

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