1978

• Fides Quaerens Intellectum (University of Notre Dame, Notre Dame, IN)

1979

• Faith and Reason in the Middle Ages (Central Michigan University, Mt Pleasant, MI)

1980

• Principles of Natural Law (University of Notre Dame Law School, Notre Dame, IN)
• In Defense of Natural Theology (American Catholic Philosophical Assoc, Philadelphia, PA)
• Aristotle (St Anselm's College, Manchester, NH)
• Faith: Source of Christian Ethics (Center for Continuing Education, Notre Dame, IN)
• The Degrees of Practical Knowledge (Jacques Maritain Conference, St. Louis, MO)
• Salute on Behalf of English Speaking People (VIII Congresso Tomistico Internazionale, Rome)
• The Nature of Theology in Albert (University of Köln, Köln WEST GERMANY)
• Lilies that Fester (American Maritain Society, Louisville, KY)
• Absolutes, Relatives and In-Laws (Rockhurst College, Kansas City, MO)
• Governability of a Democracy (Jacques Maritain Center Conference, Notre Dame, IN)
• The End of the World: Pessimism and Faith (St Paul Seminary, St Paul, MN)
• Chesterton as Peeping Thomist (G.K. Chesterton Society Conference, Notre Dame, IN)
• Christian Morality and Sexuality (Assumption University, University of Windsor, CANADA)

1981

• Rhyme and Reason (Marquette University, Milwaukee, WI)
• Whether Social Action Requires Contemplation (Walsh College, North Canton, OH)
• Faith and Freedom (Fellowship of Christian Scholars, Milwaukee, WI)
• St Thomas Aquinas (Arts and Letters College Core Course, Notre Dame, IN)
• The Case for Natural Law (Philosophy Department Conf on Philosophy of Religion, Notre Dame, IN)
• Commentary (5th International Scotistic Congress, Salamanca, SPAIN)
• The Midwest as an Exotic Locale (Bouchercon Conference, Milwaukee, WI)
• Maritain the Person: Common Good (Gannon University, Erie, PA)
• Reality Penetrating Fiction (Center for Thomistic Studies, Houston, TX)
• St Thomas Today (Center for Thomistic Studies, Houston, TX)
• Boethius and Individuals (American Philosophical Association, Philadelphia, PA)
• How the Gospels Affect What We Do (Christians in Commerce, South Bend, IN)
• On Writing Detective Fiction (Chestertonians of Notre Dame, Notre Dame, IN)
• Plot, Fate and Providence (Calvin College, Grand Rapids, MI)

1982

• The Spirituality of Thomas (Wadhams Hall College-Seminary, Ogdensburg, NY)
• St Thomas and Latin Averroism (Central Michigan University, Mt Pleasant, MI)
• Whither the Catholic Theologian? (Graduate Theological Union, Berkeley, CA)
• Faith and History, Faith and Theology (St Mary's College, Moraga, CA)
• Maritain and Poetic Knowledge (Loyola Marymount University, Los Angeles, CA)
• St Thomas Aquinas on Omnipotence (Thomas Aquinas College, Santa Paula, CA)
• Aquinas and Divine Omnipotence (7th International Congress of Medieval Philosophy, Louvain-la-Neuve, BELGIUM)
• Tragedy: Not to Be a Saint (St Joseph High School, Rolling Prairie, IN)
• The Major Intuitions of Jacques Maritain (International Congress on Jacques Maritain, Ottawa, CANADA)
• St Thomas and the God of the Philosophers (St John Fisher College, Rochester, NY)
• Maritain's Influence on American Catholic (International Colloquium on Maritain Today, Milan, ITALY)
• Participant (Socratic Seminar, Indianapolis, IN)
• Artful Philosopher: Writing Philosophy (Creighton University, Omaha, NE)

1983

• Philosophy and the Humanities (Bellevue College, Bellevue, NE)
• The Names of God (Dallas Baptist College, Dallas, TX)
• The Individual and the Person in Maritain (Thomas Aquinas College, Santa Paula, CA)
• Fundamental Option:A Philosopher's Reflections (Universidad de Navarra, Pamplona, SPAIN)
• Natural Law in St Thomas (Universidad de Navarra, Pamplona, SPAIN)
• Natural Law as the Starting Point in Ethics (Wabash College, Crawfordsville, IN)
• Maritain and Catholic Political Thought (American Political Science Meeting, Chicago, IL)
• On the Universal Recognition of Natural Law (2nd Catholic Congress on Philosophy, Cordoba, ARGENTINA)
• Our Mystery Fiction (Association of University Women, South Bend, IN)
• On Behalf of Thomas Aquinas College (New York Yacht Club, New York, NY)
• Natural Law According to St Thomas (Rolduc Seminary, HOLLAND)
• Commentator on Alasdair MacIntyre's talk (American Maritain Conference, Princeton, NJ)
• Address to National Honor Society (St Joseph's High School, South Bend, IN)
• Aquinas, Analogy and Foundationalism (Conference in Philosophy of Religion, Lincoln, NE)

1984

• Television panel. Human Nature and Morality (WNIT-TV, Elkhart, IN)
• Aristotle's Ethics (Trinity School, South Bend, IN)
• Universal Recognition of Natural Law (American Catholic Philosophical Association, Pittsburgh, PA)
• The Foundation of Human Rights (Niagara University, Niagara University, NY)
• Philosophies Previously Forgotten (Gannon University, Erie, PA)
• Mystery Literature (Public Library, Columbus and Franklin County, OH)
• Public Policy and Morality (University of Notre Dame, Notre Dame, IN)
• Literature and the Mystery Novel (American Association of University Women, South Bend, IN)
• Maritain and Natural Rights Revisited (Loyola University, Chicago, IL)
• A Debate: Charter of the Rights of Catholics (Princeton University, Princeton, NJ)
• Stein and Thomism (The Catholic University of America, Washington, DC)
• After Laughter (South Bend Public Library, South Bend, IN)
• Thomism Revisited (Ohio Dominican College, Columbus, OH)
• Single-Issue Voting (University of Notre Dame, Notre Dame, IN)
• RV. Recant or Resign (Irv Kupcinet's 'Kup's Korner', Chicago, IL)

1985

• The Mystery Novel (Public Library, Milwaukee, WI)
• Christianity Challengers (International Conference of Theists and Atheists, Dallas, TX)
• TV. Ordination of Women (Mike Wallace's '60 Minutes', Chicago, IL)
• Address (Seminarians, Conception Abbey, Conception, MO)
• Catholic Social Teaching and the U S Economy (Winooski, VT)
• Moderator. (Conference on Religious Liberty, Washington, DC)
• Moral Thought of Thomas Aquinas (Marquette University, Milwaukee, WI)
• Art and the Meaning of Life in Aristotle (The Catholic University of America, Washington, DC)

1986

• Lord Acton and the History of Liberty (Indiana University, Bloomington, IN)
• Mystery and Religious Characters (Cathedral of St James Lyceum, Chicago, IL)
• Action Theory in Thomas (Thomas-Institut, Cologne, WEST GERMANY)
• Fey Razon: Una Antitesis Aparente (Universidad Catolica de Buenos Aires, Buenos Aires, ARGENTINA)
• La Ley Natural (Universidad, Catolica de Salta, Salta, ARGENTINA)
• Fe Y Razon (Universidad, Catolica de Salta, Salta, ARGENTINA)
• Mystery Fiction (Institute of Humanities, Salta, ARGENTINA)
• Action Theory in Aquinas (Instituto de filosofia practica, Buenos Aires, ARGENTINA)
• La Ley Natural (Universidad Catolicade Buenos Aires, Buenos Aires, ARGENTINA)
• Modern American Literature (St Hilda's College, Hurlingham, ARGENTINA)
• Esse ut actus intensivus (Instituto de filosofia practica, Buenos Aires ARGENTINA)
• Chesterton (Instituto de Cultura Inglesa, Buenos Aires, ARGENTINA)
• Matter is known by Analogy, Universidad de Buenos Aires, Buenos Aires, ARGENTINA)
• The Names of God (Universidad de San Salvador, San Miguel, ARGENTINA)
• La Iglesia en Los Estados Unidos (Quinta Once Varas, Miguel, ARGENTINA)
• Dissent in the Church (St Thomas More Society, Notre Dame, IN)
• Positive Law, Its Basis and Purpose (Rolduc Institute, Rolduc, HOLLAND)
• Ber Begriff von Kunst (Westfalische Wilhems-Universitat, Muenster, WEST GERMANY)
• Art and the Meaning of Life (University Of Nijmegen, Nigmegen, HOLLAND)
• The Metaphysical Foundation of Narrative (Christendom College, Front Royal, VA)
• The Extraordinary Synod (Catholic Forum of Pittsburgh, PA)

1987

• Lord Acton (Historical Writer Conference, Cambridge, MA)
• Importance of the 'Poetics' for Understanding (University of Navarra, Pamplona, SPAIN)
• Humanities Value Today (Ohio State University, Bowling Green, OH)
• Maritain In and On America (Princeton Club, New York, NY)
• Christian Philosophy Revisited (Society for Philosophy and Religion, Buffalo, NY)
• Mystery Novels (Sturgis Public Library, Sturgis, MI)
• Mystery Writing (Indiana University of South Bend, South Bend, IN)
• The Pope's Instruction on 'In Vitro Fertilization' (Stanford Students for Life, Berkeley, CA)
• Commencement Address (St Hyacinth College and Seminary, Granby, MA)
• Commencement Address (Thomas More Institute of Liberal Arts)
• Roots of Modern Subjectivism (Bay Area Conference on Ethics of Human Reproduction, San Rafael, CA)
• Existential Interpretation (Ball State University, Muncie, IN)
• Two Visions of Human Life and Procreation (Bishops' Workshop, Dallas, TX)

1988

• Heeding the Magisterium (Stonehill College, North Easton, MA)
• Rise of Existential Thomism (Stonehill College, North Easton, MA)
• Commentator on Richard Purtill (University of Notre Dame, Notre Dame, IN)
• Student Unrest at the University of Paris (Marquette University, Milwaukee, WI)
• Literature and the Mystery Novel (Bellarmine College, Louisville, KY)
• The Great Gatsby (Forever Learning Center, South Bend, IN)
• The Catholic University (University of Notre Dame, Notre Dame, IN)
• Revival of Thomism, Phase I and II (University of Notre Dame, Notre Dame, IN)
• Philosophy, Love of Wisdom (American Academy of Natural Family Planning, Albuquerque, NM)
• Radio. Read original chapters (National Public Radio Station WAUS, Berrien Springs, MI)
• 13 1/2 hrs television films on St Thomas (Eternal Word Television Network- EWTN, Birmingham, AL)
• Television. 'Mother Angelica Live' (EWTN, Birmingham, AL)
• Justice, Mercy, Supererogation (Commentator, Christian and Theistic Philosophy, University of Notre Dame, IN)

1989

• Fiction and Philosophy (Shellburne Study House, Valparaiso, IN)
• Importance of Christianity in Life-Perspective (Opus Dei for Women, Chicago, IL)
• Literature and the Mystery Novel (Illinois Catholic Library Association, River Forest, IL)
• On Being a Catholic Writer (Catholic Commission on Intellectual, Cultural Affairs, New Orleans, LA)
• What is a Human Life? (Jellema Lecture Series, Calvin College, Grand Rapids, MI)
• Menace of Philosophy (Jellema Lecture Series, Calvin College, Grand Rapids, MI)
• Voice of Conscience (Aquinas Lecture, University of Dallas, Dallas, TX)
• Rorty and the Enlightenment (Claremont Institute, Claremont, CA)
• Fiction and the Mystery Novel (Friends of the Library Annual Meeting, Notre Dame, IN)
• Faith and Fiction (Catholic Forum, New York, NY)
• Writing as a Profession (Joliet Catholic High School, Joliet, IL)

1990

• Confessions of a Catholic Writer (Free University of Amsterdam, Amsterdam, HOLLAND)
• A Response to Carlo Caffara (John Paul II Institute on Marriage and the Family, Washington, DC)
• Philosophy and Catholicism (Carroll College, Helena, MT)
• Catholic Education and Intellectural Culture (Carroll College, Helena, MT)
• Faith and Fiction (Carroll College, Helena, MT)
• Thomistic Ethics and the Moral Life (Carroll College, Helena, MT)
• Dante the Philosopher (Carroll College, Helena, MT)
• Natural Law and Natural Theory (The Catholic University of America, Washington, DC)
• Natural Law and Natural Rights (The Catholic University of America, Washington, DC)
• The Mystery Novel (Michigan City Library, Michigan City, IN)
• Natural Law and Natural Rights (Thomas More Society, Notre Dame, IN)
• Sin and Crime/Mercy and Punishment (Catholic University of America, Washington, DC)
• How Universities Became Non-Catholic (St Norbert College, Green Bay, WI)
• The Mystery Novel (Barrinton Writing Workshop, Barrington, IL)
• Is a Philosophical Ethics Possible? (Knights of Columbus and John Paul II Institute, Washington, DC)
• Does Man Have a Natural Ultimate End? (Knights of Columbus and John Paul II Institute, Washington, DC)
• The Role of Faith in Moral Philosophizing (Knights of Columbus and John Paul II Institute, Washington, DC)
• The Nature of Moral Theology (Knights of Columbus and John Paul II Institute, Washington, DC)
• The Dilemma of Modern Philosophy (Connecticut Catholic Forum, Riverside, CT)
• Catholic Character at Notre Dame (Student Union Board, Notre Dame, IN)
• Aquinas and Aristotle on Existence (Catholic University of America, Washington, DC)
• Is Thomas an Aristotelian? (University of Houston Center for Thomistic Studies, Houston, TX)

1991

• Thomism: Contemporary Philosophy (Benedictine College, Atchison, KS)
• Amateur Sleuth (Middlebury Public library, Middlebury, IN)
• St Thomas and Natural Rights (University of Notre Dame Law School, Notre Dame, IN)
• Dissent (Serra Catholic Forum, University of Toledo, Toledo, OH)
• Thomistic Revival (Wethersfield Institute, Alexis Park Hotel, Las Vegas, NV)
• Thomistic Revival (Wethersfield Institute, University of San Diego, San Diego, CA)
• Thomistic Revival (Wethersfield Institute, University of Notre Dame, Notre Dame, IN)
• Commencement Address (Delbarton Seminary, Morristown, NJ)
• Mystery Writing (1991 Reunion, Notre Dame, IN)
• Mystery and Medieval Times (Public Library, Anderson, IN)
• Relevance of Aristotle (St Bonaventure University, St Bonaventure, NY)
• Aspects of Human Knowledge (St Bonaventure University, St Bonaventure, NY)
• Creation and the World (St Bonaventure University, St Bonaventure, NY)
• Presidential Address (Fellowship of Catholic Scholars, Denver, CO)
• Virtue of Being (Hillsdale College, Hillsdale, MI)
• The Human Person (Marian College, Indianapolis, IN)
• The Church's Moral Teaching (Clergy of the Archdiocese, Indianapolis, IN)
• Aeterni Patris: Interpretations (Higher Institute of Philosophy, Louvain, BELGIUM)
• Debate (Homosexual Organizations, Notre Dame Student Union Board, Notre Dame, IN)
• 4 Lectures on Aristotle and Aquinas (St Anselm's College, Manchester, NH)
• Ancient Quarrel (St Anselm's College, Manchester, NH)
• How to Talk About God (Forever Learning, South Bend, IN)
• Literature and the Mystery Novel (Evansville-Vandenburgh Public Library, Evansville, IN)
• The Golden Rule and Thomas Aquinas (St Thomas More College, Saskatoon, CANADA)
• The Golden Rule and Thomas Aquinas (Thomas Aquinas College, Santa Paula, CA)
• Talk (Board of Governors, Thomas Aquinas College, Santa Paula, CA)
• 3 lectures on Saint Bonaventure (Saint Bonaventure University, St Bonaventure NY)
• Literature and the Mystery Novel (Catholic Library Association, Pittsburgh, PA)

1992

• Free Inquiry vs Advocacy (Hillsdale College, Hillsdale, MI)
• Natural and Supernatural (Saint Paul's Newman Center, Wichita, KS)
• Newman and the Fullness of Christianity (St Paul's Parish Newman Center, Wichita, KS)
• Images and Imagination in Art (James Madison University, Blacksburg, VA)
• Notre Dame and Dame Philosophy (University of Notre Dame Philosophy Dept, Notre Dame, IN)
• The Mystery of Fiction (University of Oklahoma, Norman, OK)
• Aquinas's Treatises on Law and Happiness (Marquette University, Milwaukee, WI)
• Response to Rev Marvin O'Connell's Address (Catholic League/Fellowship of Catholic Scholars, Washington, DC)
• Writing for Publication (Lincoln Township Public Library, Stevensville, MI)
• Writing (Books and Co, Dayton, OH)
• Yves Simon and Moral Philosophy (American Maritain Society, Kansas City, MO)
• Religion and the Mystery Novel (Laporte Public Library, Laporte, IN)
• The Mystery of Fiction (Utah State University, Logan, UT)
• The God of the Philosophers (The Westminster Tanner-McMurrin Lecture, Westminster College, Salt Lake City, UT)
• Art and Morality (The Cathedral of the Madeleine, Salt Lake City, UT)
• The Science We Are Seeking (Presidential Address to Metaphysical Society of America, University of Notre Dame, IN)
• Response to Presentation of Aquinas Medal (American Catholic Philosophical Associaton, Saint Louis, MO)

1993

• Aeterni Patris (Saint Gerard Thomistic Institute, Notre Dame, IN)
• Varieties of Thomism (Saint Gerard Thomistic Institute, Notre Dame, IN)
• The Future of Thomism (Saint Gerard Thomistic Institute, Notre Dame, IN)
• Reflection on Ex Corde Ecclesiae (Conversation on the Catholic Character, Notre Dame, IN)
• Animal House: The Domestic Playboy (25th Anniversary Symposium, Molloy College, Rockville Centre, L.I., NY)
• Philosophandum in Fide (Roundtable on The Future of American Liberalism and Constituionalism, Washington, DC)

• Aristotle and Some Thomisms (Bradley Medieval Lecture Series, Boston College, MA)
• The Advantage of a Catholic University (Classical Philosophy Lecture Series, Loras College, Dubuque, IA)
• Kierkegaard's Indirect Communication (Universidad Panamericana, Mexico City, MEXICO)
• Response to Lifetime Award (Bouchercon Conference, Omaha, NE)
• Boethius as a Commentator on Aristotle (Boston College, MA)
• Aristotle and Some Thomisms (Boston College, MA)
• Literature and the Mystery Novel (Southwest Mystery Book Guild, Oaklawn, IL)

1994

• Why Thomas Aquinas? (Christendom College, VA)
• Mystery Books (Indiana Library Association, Indianapolis, IN)
• Authors Interlude (Arlington Heights Memorial Library, IL)
• The Object on Which the Conscience Passes Judgment (Orvieto, ITALY)
• History and Jacques Maritain (Canadian Maritain Society, Calgary, CANADA)
• Christian Philosophy (Basics of Catholicism Conference, Notre Dame, IN)
• Mystery Workshop (University of Southern Indiana, Continuing Education, Evansville, IN)
• Happiness and the Life of Virtue (Wethersfield Conference, New York, NY)
• Literature and the Mystery Novel (Michigan City Public library, IN)
• Natural Law, Natural Right and the Mystery Novel (Ball State University, Continuing Education, Muncie, IN)
• Natural Law, Natural Right (Lenoir-Rhyne College, Hickory, NC)
• Family Resemblances (Women for Faith and Family, St Louis, MO)
• The Last 100 Years of Thomism in North America (Catholic University of America, Washington, DC)
• The Mystery Novel (Tippecanoe County Library, Lafayette, IN)
• Christian Philosophy (Baylor University, Waco, TX)

1995

• Moral Truth (Bishop's Meeting, Dallas, TX)
• Commencement Address (St Anselm College, Manchester, NH)
• Catholic Authors (Notre Dame Elderhostel Course, Notre Dame, IN)
• What Libraries Mean to Me (Indiana Library Federation District One Fall Conference)
• Liberty, Responsibilities Forum (Liberty Fund, Pasadena, CA)
• Mystery of Fiction (The Presidential Lecture and Aquinas and kierkegaard on Faith and Reason, Hope College, Holland, MI)
• Master of Ceremonies (Thomas Aquinas College, 25th Anniversary Party, Beverly Hills, CA)

1996

• Ethics and Aquinas on Virtue (McManus Lectures, Wheaton College, IL)
• Mystery Novel (Wakarusa Public Library, Wakarusa, IN)
• Law and Ardor Mystery (Woodstock Fine Arts, Father Dowling Mysteries, Woodstock, IL)
• Writer's Conference, Keynote Speaker (University of Georgia, GA)
• Keynote Address (Basics of Catholicism Conference, University of Notre Dame, IN)
• Keynote Address (Third Summer Thomistic Institute, University of Notre Dame, IN)
• Acquiring a Catholic Culture (Wanderer Forum, Washington, DC)
• Can the Christian be a Humanist? (St Charles Borromeo Seminary, Philadelphia, PA)
• 4 talks on the Vatican Council-Pre, Council, Post, Future (Diocese of Venice, FL Priests, Boca Grande, FL)

1997

• Catholic Education on the Threshold of the Milennium (Mile Hi Congress, Denver, CO)
• Political Order and Culture: Renewal of Civilization (St Vincent College, LaTrobe, PA)
• Morality and Literature (Town and Gown Lecture, Ball State University, Muncie, IN)
• Three Rival Versions of Moral Inquiry (Loyola University, New Orleans, LA)
• Aquinas (Ohio Dominican College, Columbus, OH)
• The Church Today (The Legatus Society, Cincinnati, OH)
• Thomas Aquinas for the Ages (Thomas Aquinas College, Santa Paula, CA)
• Awaiting the Third Milennium (Saint Agnes Parish, Lacrosse, WI)
• Lenten Spirituality (Saint Matthew's Parish, South Bend, IN)
• Thomas Aquinas (Saint Mary's College, Moraga, CA)
• Toward a Renewal of Civilization (Saint Vincent College, Latrobe, PA)

1998

• C.S. Lewis and the Middle Ages (The New York C.S. Lewis Society, Queens, NY)
• Keynote Address (Fourth Thomistic Summer Conference, Notre Dame, IN)
• Keynote Address (Basics of Catholicsm Conference, Notre Dame, IN)
• Jacques Maritain: Thinking and Praying (R I Wayne Kraft Memorial Lecture, Patron's Day, Allentown College of Saint Francis de Sales, PA)
• Firing Line (William F. Buckley Television Show on Vatican II, NY)
• The Blessing of the Magisterium (Call to Holiness Conference, Milwaukee, WI)
• The Blessing of the Magisterium (Wanderer Forum, Washington, DC)

1999

• 3 Lectures on Literature (The Prologue Society, North Palm Beach, FL)
• What is Literature? (Public Lecture, Truman State University, Kirksville, MO)
• Science, Faith, and Reason: The Galileo Problem (Truman State University Faculty and Student Colloquium, Kirksville, MO)
• How to Write Detective Stories (Retired of Notre Dame (ROND), Notre Dame, IN)
• Natural Law and the Limits of Disagreement (Samford University, Birmingham, AL)
• Authority and Dissent (New York Archdiocesan Center, NY)
• Fides et Ratio and Implicit Philosophy (University of Dallas, Irving, TX)
• What is Literature? (University of Dallas, Irving, TX)
• Sister Edith Stein (Catholics United for the Faith, Dallas, TX)
• Keynote Address - Basics of Catholicism Conference (University of Notre Dame)
• Keynote Address - "Faith and Reason" Thomistic Conference,(University of Notre Dame)
• What is Literature? Keynote Address, 6th Annual Harriette Austin Writers Conference (University of Georgia)
• My Experience as a Christian Professor in the Classroom, Faculty Retreat, (Hope College, Holland, MI)
• Keynote address: 1999 CRISIS MAGAZINE Partnership Dinner, (Washington, DC)
• The Recovery of Natural Theology - 5 lectures in the Gifford Lecture Series (University of Glasgow, Scotland)
  • Personal Prejudice and Natural Theology
  • Some Foes and Friends of Natural Theology
  • Atheism Is Not the Default Position
  • Radical Chic and Nihilism
  • Theology and Natural Theology
• Religion and Ethics in American Public Life, (University of St Andrew's, Scotland)

2000

• The Recovery of Natural Theology - 6 lectures in the Gifford Lecture Series (University of Glasgow, Scotland)
  • Aspects of Argument
  • Intemperate Reasoning
  • Kierkegaard and Newman on Subjectivity
  • That God Exists
  • Natural Theology and the Preambles of Faith
• It's Tough to be Moral (Broadcast Education Association, Las Vegas)
• Darwinism Revisited, Louisiana State University (Baton Rouge, LA)
• Are There any Self-Evident Moral Truths? (University of Richmond, Richmond, VA)
• Father Dowling Murder Mysteries (Hesburgh Lecture Series, Manchester, NH)
• Whatever Happened to Catholic Morality? (Universal Notre Dame Night, Newburgh, NY)
• Catholic Author Show, Father McCloskey interviews (EWTN, Birmingham, AL)
• Detective Novels and Theology (Auburn University at Montgomery, AL)
• A Response to Paul Griffiths on the Thought of Yves Simon (Divinity School, University of Chicago
• DeSales Academy Graduation Speech (Baltimore)
• Thomistic Natural Law and Aristotelian Philosophy, at Aquinas and the Natural Law Conference (Sacred Heart Seminary, Detroit)
• Christian Philosophy (at the Basics of Catholicism Conference, Notre Dame, IN)
• Faith and Science (at the Thomistic Conference, Notre Dame, IN)
• Friends or Foes in the New Millennium, Keynote Address (Faith and Reason Conference, Melbourne, Australia)
• What Went Wrong with Vatican II (Legatus meeting, Park Ridge, IL)
• Fides et Ratio (Fellowship of Catholic Scholars meeting, Atlanta, GA)
• Four interviews on Catholic Authors by Father McCloskey, (Birmingham, AL)
• Vatican II (Wanderer Forum, St Louis)
• Death of Culture and the Culture of Death (at the Center for Ethics Conference on the Culture of Death, Notre Dame, IN)
• Maritain is the Model of the Catholic Scholar (at the plenary session of the American Maritain Association Conference, Notre Dame, IN)
• Presentation of the Aquinas Medal to Rev. Theodore Hesburgh and Prof. Jude Dougherty (for the American Maritain Association, Notre Dame, IN)
• What Went Wrong with Vatican II (for the Echo Society, Columbus, IN)
• The Mystery of Fiction (Prairie Trails Library, Burbank, IL)
• Presentation of the Aquinas Medal to Peter Geach (American Catholic Philosophical Association meeting, Dallas)

2001

• Advancing into the Past: The Catholic Virtue Tradition and the American Prospect (at the Faith and Reason Conference, Washington, DC, Feb. 2-3).
• The De-naturing of the Natural Law (Public Lecture at Loyola Marymount University, Los Angeles, Feb. 15).
• Philosophy and Literature (Public Lecture at Loyola Marymount University, Los Angeles, Feb 16).
• Maritain on Liberal Education (St. Mary's College, Moraga, CA, Feb. 2).
• St Thomas and the Fine Artsn (St. Justin Martyr, Shohola, PA, Mar. 10).
• Role of Aquinas Today (Denver Archdiocese Public Lecture, April 22).
• The Gospel and the Contemporary Mind (Denver Archdiocese, April 23).
• Mystery of G. K. Chesterton (American Chesterton Society Annual Meeting, Minneapolis, MN, June 22).
• Literature and the Mystery (Starke County Library, May 20).
• Keynote Address (Basics of Catholicism Conference, Notre Dame, May 25).
• Faith and Reason (Basics of Catholicism Conference, Notre Dame, June 1).
• John Paul II and the Catholic University (at the meeting of the Catholic Citizens of Illinois, Chicago, IL, August 10, 2001).
• The Vocation of the Physician and Human Suffering (at the annual St. Luke’s meeting, for the St. Joseph Regional Medical Center, Mendoza School of Business. Notre Dame, October 18).
• Newman’s Option: Catholicism or Atheism, (Plenary Session, Steubenville College, October 19).
• Literature and the Mystery Novel (Peabody Library, Columbia City, IN, October 27).
• Athens and Jerusalem in the Liberal Arts (Hillsdale College, MI, November 12).
• The End of Philosophy (Undergraduate Philosophy Club, DeBartolo Hall, University of Notre Dame, November 28).
• Devil’s Dignity: Concentrated Thoughts on Capital Punishment (Culture of Life Conference, University of Notre Dame, November 29).

2002

• "Literature and the Catholic Mystery Novel" (at Franciscan University's Catholic Writers Festival, September 14).
• EWTN Taping of "A Catholic View of the Arts" by Father Michael Scanlan (at Franciscan University, September 13).
• "Evangelium Vitae" (Center for Social Concerns students, September 23).
• "From Images and Shadows to Truth," Culture of Life Conference, Notre Dame, September 26, 2002
• "Relevance of Thomas Aquinas's 'Summa Theologicae' Today" (Siena Heights College, Adrian, MI, October 3).
• "What Happened to Vatican II?" (Sterling Heights, MI, Call to Holiness Conference, October 4).
• "Maritain and Thomas Aquinas" (Maritain Association meeting, Princeton University, October 17).
• "Chesterton at Notre Dame" (Notre Dame Center for Ethics and Culture, Notre Dame, IN, November 11).
• "From Images and Shadows to Truth" (St. Thomas More College, Fort Worth, TX, November 16).
• "On the Distinction of Essence and Esse: Is Thomism an Existentialism?" (Fu-Jen University, Taipei, Taiwan, December 12).

2003

• Keynote address, Yves Simon conference (sponsored by Integretas, Chicago, January 23).
• "Human Rights" (Villanova University, a Maritain lecture, March 11).
• "From Shadows and Images to Truth" (Baylor University, Waco, TX).
• "Mystery and Meaning in the Arts" (Baylor University, Waco, TX).
• "Be" (Commencement address, University of St. Thomas, Houston, May 10).
• The Joseph Lectures (a six week series, presented at the Pontifica Universita Gregoriana, Rome, March-May).
• "From Images and Shadows to Truth" (a public lecture at the Pontifica Universita Gregoriana, Rome, May 23).
• 'Man is by Nature a Political Animal' and 'Centesimus Annus' (at the seminary in Bratislava, July).
• "Maritain and the Pope on Democracy" (at the seminary in Bratislava, July).
• "The Primacy of the Common Good" (at the seminary in Bratislava, July).
• "Natural Law and Centesimus Annus" (at the seminary in Bratislava, July).
• Keynote address, "Ethics Without God?" conference (Notre Dame, IN, July 13).
• "The Mystery Novel Novel as Literature" (Writers’ Conference, University of Georgia Continuing Education Center, Athens, GA, July 19).
• "Roots and Characteristics of Christian Humanities: Perspective of Thomas Aquinas" (at the annual meeting of the Pontifical Academy of Thomas Aquinas, Rome, September 23).
• "Absence of God, Absence of Man" (at the Congresso Tomista Internazionale, Rome, September 22).
• "The Road Not Taken" (at the Center for Ethics and Culture conference, University of Notre Dame, October 3).
• "Tradizione e ragione critica nella" (at the Lateran University, Rome, October 9).
• "Human Person and a Culture of Freedom" (at the American Maritain Association meeting, Chicago, IL, October 18).
• "Condition of the Church in America" (The Chicago Chapter of Legatus, Park Ridge, IL October 23).
• "Religion and Mysteries" and "Are Mysteries Important?" (panel presentations at the Magna Cum Murder conference, Muncie, IN October 23, 24).
• "Faith and Reason: Putting Together What Man Has Put Asunder" (at a meeting of the Newman Society, Washington, D.C., Oct. 31).

2004

• "Why I am Still a Thomist" (Campion College, San Francisco, January 25).
• "Ancient Quarrel Between Philosophy and Poetry" (University of San Francisco, January 27).
• "Are There Any Great Books?" (Loyola College, Baltimore, March 31).
• "Literature and the Mystery Novel" (Catholic Evidence League, Baltimore, MD, April 2).
• "Value of Family and Children" (St Helena Parish, Minneapolis, MN, April 22).
• "Being Irish in America" (Irish American Society, Muskegon, MI, May 11).
• "Implicit Moral Knowledge" (Calvin College, May 14).
• "St. Thomas and the Natural Law" (Thomistic Institute, University of Notre Dame, July 6).
• "Thomism Under Fire" (University of Manitoba, Canadian Maritain Association, May 30).
• Panel discussion of Groarke’s "The Good Rebel" (University of Manitoba, Waterloo, ON, June 2).
• "Being, Relation, Person" (Pontifical Academy of St. Thomas Aquinas, June 26).
• "Implicit Moral Knowledge" (Lezione Tomista conference, University of Palermo, July 20).
• "Physics for Realists" (University of Notre Dame, July 30).
• "Humor and Waugh: Laugh. It Ought to Rhyme with Waugh" (Center for Ethics and Culture English Novelists series, Notre Dame, IN, October 5).
• "Mystery Writers" (Plainfield-Guilford Township Public Library, Plainfield, IN, October 14).
• "Renewal of CivilizationTowards Justice and Peace" (American Maritain Association, Atlanta, GA, October 21).
• "The Scandal of Philosophy" (Pázmány Péter Katolikus Egyptem, Budapest, Hungary, October 27).
• Interview with Alexander McCall Smith (Mystery Writers Conference, Ball State University, October 23).