Abstract

author. University Professor in the School of Law, Columbia University. (From July 2006, Professor of Law, New York University.) Earlier versions of this Essay were presented at the Colloquium in Legal and Social Philosophy at University College London, at a law faculty workshop at the Hebrew University of Jerusalem, and at a constitutional law conference at Harvard Law School. I am particularly grateful to Ronald Dworkin, Ruth Gavison, and Seana Shiffrin for their formal comments on those occasions and also to James Allan, Aharon Barak, Richard Bellamy, Aileen Cavanagh, Arthur Chaskalson, Michael Dorf, Richard Fallon, Charles Fried, Andrew Geddis, Stephen Guest, Ian Haney-Lopez, Alon Harel, David Heyd, Sam Issacharoff, Elena Kagan, Kenneth Keith, Michael Klarman, John Manning, Andrei Marmor, Frank Michelman, Henry Monaghan, Véronique Munoz-Dardé, John Morley, Matthew Palmer, Richard Pildes, Joseph Raz, Carol Sanger, David Wiggins, and Jo Wolff for their suggestions and criticisms. Hundreds of others have argued with me about this issue over the years: This Essay is dedicated to all of them, collegially and with thanks.