Academic awards and distinctions
President, American Catholic Philosophical Association (1974-75); President, Metaphysical Society of America (1983-84); President, Society for Philosophy of Religion (1978-79); Founder and President-elect of the Kentucky Philosophy Association (1966); Member, European Academy of Sciences and Arts; Member, the American Philosophical Association, program committee, program chair, past member of Executive Committee, local host various times since joining 1962; President’s Medal, the Catholic University of America, 1999; Knight of the Order of St. Gregory the Great, 1999; Cardinal Gibbons Medal, the Catholic University of America Alumni Association; Cardinal Wright Award, Fellowship of Catholic Scholars (1994); Aquinas Medal, American Catholic Philosophical Association (1994); Jacques Maritain Scholarly Excellence Award (2000), American Maritain Association; Graduate Student Association and the Undergraduate Student Government, the Catholic University of America, Special Recognition Award, 1998; Ph.D. Honoris Causa, the Catholic University of Lublin; LHD, Honoris Causa, Thomas More College; Editor, The Review of Metaphysics (1971-); General Series Editor, Studies in Philosophy and the History of Philosophy, The Catholic University of America (1974-).

Main publications
Books Recent American Naturalism, Washington, D.C.: The Catholic University of America Press, 1960; Ed., The Theological Directions of the Ecumenical Movement, Louisville, KY: Bellarmine College Press, 1964; Ed., The Impact of Vatican II, St. Louis: Herder, 1966; Approaches to Morality, with L. Dupré et al., New York: Harcourt, Brace and World, 1966; Ed., The Good Life and Its Pursuit, New York: Paragon, 1984; Western Creed, Western Identity, Washington, D.C.: The Catholic University of America Press, 2000; The Logic of Religion, Washington, DC: The Catholic University of America Press, 2002; Jacques Maritain: An Intellectual Profile, Washington, DC: The Catholic University of America Press, 2003; Religion – Gesellschaft – Demokratie: Augewahlte Aufsatze, Berlin: Duncker & Humblot, 2003 (Band 16 of the series Soziale Orientierung). Essays and articles Selected from more than 80 published works: ‘Lessons from the History of Science and Technology’, Studies in Philosophy and the History of Philosophy, vol. IV, ed. by John K. Ryan. Washington, D.C.: The Catholic University of America Press, 1969; ‘The Finding of Law’, Proceedings, American Catholic Philosophical Association, vol. XLIX, 1975, pp. 1-12; ‘Determining Moral Norms’, Proceedings, American Catholic Philosophical Association, 1978, pp. 39-51; ‘Potentiality: From Aristotle to Rescher and Back’, Studies in Honor of Nicholas Rescher, Dordrecht: Reidel Publishing Co., 1979, pp. 109-122; ‘The Uses of History in Teaching Philosophy’, Teaching Philosophy, 1979, pp. 13-21; ‘The Work Ethic of John Paul II’, Papal Economics, The Heritage Foundation, vol. VI, 1981, pp. 1-7; ‘The Notion of “Entitlement” in Human Rights Debate’, Human Rights: Abstracts of Papers from the Tenth Interamerican Congress of Philosophy, October 18-23, 1981, Tallahassee: The Florida State University; ‘Intellectuals with Dirt Under Their Fingernails: Attitudes Toward Science and Technology and the Difference They Make’, Communio, Fall 1982, pp. 225-237; ‘Maritain on Church and State’, Communio, Winter 1982, pp. 389-403; ‘Toward a Thomistic Philosophy of Religion’, Proceedings, American Catholic Philosophical Association, 1983, pp. 105-115; ‘Keeping the Common Good in Mind’, Studi Tomistici, vol. XXV, The Ethics of St. Thomas Aquinas, Pontificia Academia di S. Tommaso, pp. 188-201; ‘Von Ketteler, Leo XIII and John Paul II on the “Social Question”’, Catholicism in Crisis, April 1985, pp. 24-31, also published in Servo Veritatis, Uniwersytet Jagiellonski, vol. CCXXIX, 1988, pp. 179-196; ‘The Thomistic Element in the Social Philosophy of John Paul II’, Proceedings, American Catholic Philosophical Association, 1986; ‘The Interior Life’, Crisis, May 1987, pp. 19-23; ‘Aquinas on Punishment’, Studi Tomistici, vol. XXX, 1987, Libreria Vaticana, pp. 157-170; ‘Separating Church and State’, The World and I, vol. II, no. 12, December 1987, pp. 675-687; ‘John Paul II’s Global Village’, The World and I, vol. III, no. 7, 1988, pp. 663-670; ‘Episcopal Authority and the Teaching of Morality’, Creative Love: The Ethics of Human Reproduction, ed. by John F. Boyle, Front Royal, VA: Christendom Press, 1989, pp. 197-214; ‘Shifting Philosophical Sand and Legal Structures’, The Personalist Forum, vol. IV, no. 2, Fall 1989, pp. 1-19; ‘Collective Guilt’, The American Journal of Jurisprudence, vol. XXXV, 1990, pp. 1-14; ‘Abstraction and Imagination in Human Understanding’, L’atto aristotelico e le sue ermeneutiche, Roma: 1990, pp. 1-14; ‘What Was Religion?’, Modern Age, Vol. XXXIII, no. 2, Summer 1990, pp. 113-121, reprinted: Vital Speeches, vol. LVII, no. 10, March 1, 1991, pp. 316-320; ‘On the Justification of Rights Claims’, Collana Dialogo di Filosofia, no. 8, Herder Università Lateranense, Roma: 1991, pp. 1-14; ‘The Necessity of Punishment’, The World and I, vol. VIII, no. 1, January 1993, pp. 557-569; ‘Accountability without Causality: Tort Litigation Reaches Fairy Tale Levels’, Catholic University Law Review, vol. XXXXI, no. 1, Fall 1991, pp. 1-18; ‘Christian Philosophy: Sociological Category or Oxymoron’, The Monist, vol. LXXV, no. 3, 1992, pp. 283-290; ‘Edith Stein: The Convert in Search of Illumination’, Crisis, December 1992, pp. 39-43; ‘Maritain at the Cliff’s Edge: From Antimoderne to Le Paysan’, Crisis, November 1994, pp. 40-45; ‘One Hundred Years of Philosophy at The Catholic University of America’, Fellowship of Catholic Scholars Newsletter vol. XIX, no. 1, December 1995; ‘Thomism’, Encyclopedia of Applied Ethics, San Diego, CA: Academic Press, vol. 4, pp. 365-372, 1998; ‘Professional Responsibility’, The World and I, October 1996, pp. 321-333; ‘The Failure of Postivism and the Enduring Legacy of Comte’, in Recovering Nature, ed. by J.P. O’Callaghan, T.S. Hibbs, Notre Dame, IN: University of Notre Dame Press, 1999; ‘Indestructible Islam’, Modern Age, Fall, 2002, pp. 324-332; ‘Wretched Aristotle’, Homiletic & Pastoral Review, August-September 2003, pp. 20-27; ‘Does National Identity Matter’, The World & I, March 2004; ‘The Fortunes of the Berlin (Humboldt) University in America and the Future of Western Philosophy’, in Erfurter Universitatsreden, ed. Wolfgang Bergsdorf, 2004; ‘The Ontology of the Artifact’, Homiletic & Pastoral Review, February 2006, pp. 17-21; ‘The Fragility of Democracy’, Modern Age, Spring 2006, pp. 119-129; ‘A Rational Preamble’, Homiletic & Pastoral Review, June 2006, pp. 20-23; ‘Aristotle in North America’, Fenomenologia e Società, n. 1/2006 anno XXIX, pp. 135-142, 2006; ‘Phenomenology as Ancilla Theologiae’, Angelicum, Vol. 82 (No. 2), 2005, pp. 389-398; ‘National Identity’, in Nationale und Kulturelle Identitat im Zeitalter der Globalisierung, ed. Anton Rauscher, Berlin: Duncker & Humblot, 2006, pp. 13-23; ‘Newman vs. Humboldt and the Vision of Leo XIII’, in Human Nature in Its Wholeness: A Roman Catholic Perspective’, ed. Daniel N. Robinson et al., Washington, DC: The Catholic University of America Press, 2006, pp. 182-193.