Tom Rockmore is Professor of Philosophy at Duquesne University. His previous publications include Cognition: An Introduction to Hegel’s Phenomenology of Spirit (1997), Marx after Marxism (Blackwell Publishing, 2002) and Before and After Hegel: A Historical Introduction to Hegel’s Thought (2003). Joseph Margolis is Laura H. Carnell Professor of Philosophy at Temple University. His recent publications include Life without Principles (Blackwell Publishing, 1996), The Unraveling of Scientism: American Philosophy at the End of the Twentieth Century (2003) and Moral Philosophy after 9/11 (2004). Armen T. Marsoobian is Professor of Philosophy at Southern Connecticut State University. He is Editor-in-chief of the Blackwell journal Metaphilosophy. He has co-edited three books, Justus Buchler’s Metaphysics of Natural Complexes (1990), Nature’s Perspectives: Prospects for Ordinal Metaphysics (1991) and The Blackwell Guide to American Philosophy (Blackwell Publishing, 2004).