This collection of new essays on political and legal theory concentrates on themes dealt with in the work of Felix Oppenheim, including fundamental political and legal concepts and their implications for the scope of morality in politics and international relations. Among the issues addressed are the relationship between empirical and normative definitions of 'freedom', 'power' and 'interests', whether governments are free to act against the national interest, and whether they can ever be morally obliged to do so.Notes on the Contributors Introduction: I.Carter & M.Ricciardi PART I: NORMATIVE ANALYSIS AND POLITICAL CONCEPTS Felix Oppenheim's Deontics; P.D.Lucia From Hobbes to Oppenheim: Conceptual Reconstruction as Political Engagement; T.Ball Essential Contestability and the Claims of Analysis; M.Ricciardi Freedom and Bivalence; H.Steiner Dimensions of Nomic Freedom; A.G.Conte 'Ought' implies 'Practical Possibility'; I.Carter Clarifying the Science Wars: The Concept of Scientific Authority; M.R.Weaver PART II: POLITICAL MORALITY AND INTERNATIONAL RELATIONS On Public Moral Appeal and Identification; J.B.Elshtain 'Anarchical Fallacies': Bentham's Attack on Human Rights; H.A.Bedau Preempting Humanitarian Interventions; T.Pogge Oppenheim's Realism and the Morality of the National Interest;; L.Bonanate Oppenheim and the National Interest; G.Kateb PART III: CODA Oppenheim in Italy: a Memoir; N.Bobbio Afterthoughts; F.E.Oppenheim Bibliography of the Publications of Felix E.Oppenheim IndexTERENCE BALL Professor of Political Science, Arizona State UniversityHUGO ADAM BEDAU Austin Fletcher Professor of Philosophy Emeritus, Tufts UniversityNORBERTO BOBBIO Emeritus Professor of Political Philosophy, University of Turin, ItalyLUIGI BONANATE Professor of International Relations, University of Turin, ItalyAMEDEO G. CONTE Professor of Philosophy of Law, University of Pavia, ItalyPAOLO DI LUCIA Professor of Philosophy of Law, University of Camerino, ItalyJEAN BETHKE ELSHTAIN LalS.