Three distinguished scholars will speak on moral and political topics during free public lectures at the UI. David Copp, a philosophy professor at the University of California at Davis, will talk about "A Theory of Normative Judgment" at 3 p.m. today in 223 Gregory Hall. Michael Walzer, a professor in the School of Social Science at the Institute for Advanced Study in Princeton and a contributing editor to The New Republic, will discuss "The Politics of Difference: Toleration and Statehood in a Multicultural World" at 8 p.m. today in the Levis Faculty Center. Jonathan Glover, a lecturer in philosophy at Oxford University and a fellow of New College in Oxford, will speak on "The Ethical Lessons From Nazism" at 3 p.m. Monday in 213 Gregory Hall. The visit of the scholars to the UI campus is sponsored by several UI units, including the Program for the Study of Cultural Values and Ethics; the Program in Arms Control, Disarmament and International Security; and the departments of history, philosophy and political science.