Harvey Siegel is Professor of Philosophy at the University of Miami. He is the author of Relativism Refuted (D. Reidel, 1987), Educating Reason (Routledge, 1988), and Rationality Redeemed? (Routledge, 1997). This article is taken from “Relativism,” to appear in Handbook of Epistemology, 1. Niinilvoto, M. Sintonen, and J. Wolenski, eds., (Kluwer, in press).