The Department of Political Science offers instruction and research in the art and science of politics. Work within the department is organized around six basic fields: American government and politics, comparative politics, public policy, political philosophy, empirical theory and methodology, and international relations. Four major current research interests cut across these areas and concentrate teaching and research efforts in the areas of American government, comparative politics, international relations, and political theory. Five centers of research activity are housed within the department: the Keller Center for the Study of the First Amendment, the Center for the Study of American Politics, the Center for Comparative Politics, the Center for International Relations, and the Center for Public Policy Research.