Daniel R. DiLeo, PhD
Daniel R. DiLeo, PhD

Daniel R. DiLeo, PhD

Associate Professor
College of Arts and Sciences


  • Catholic social teaching
  • Climate change ethics
  • Laudato Si'
  • Public theology
  • Faith-based sociopolitical action

Academic Appointments


  • Cultural and Social Studies


  • Associate Professor


Daniel R. DiLeo is an assistant professor, Catholic theological ethicist, and director of the Justice and Peace Studies Program. His teaching, research, and scholarship focus on Catholic social teaching, public theology, and climate change. Since 2009, he has been a consultant with Catholic Climate Covenant of which the U.S. Conference of Catholic Bishops is a founding member. Dr. DiLeo earned his PhD in theological ethics with a minor in systematic theology from Boston College, his MTS with a concentration in moral theology from the Boston College School of Theology and Ministry, and his BA in sociology (magna cum laude) with a minor in inequality studies from Cornell University.

Publications and Presentations


  • "Creation Care through Consumption and Life Choices" in The Theological and Ecological Vision of Laudato Si: Everything is Connected, ed. Vincent J. Miller, T & T Clark, 217-234, 2017
  • "Fostering Just Sustainability through Ignatian Spirituality" in Just Sustainability: Technology, Ecology, and Resource Extraction, ed. Andrea Vicini and Christiana Z. Peppard, Orbis Press, 250-258, 2015


  • "U.S. Catholic Bishops Discussion of President Obama vs. President Trump, 2014-2019", Journal of Religion and Society, Supplement 22, 146-167, 2021
  • "Laudato si and Climate Change Communications: Public Theology Informed by the Social Sciences", Journal of Catholic Social Thought, Vol. 17, no. 2, 261-292, 2020
  • "Introduction: The Climate Emergency and U.S. Catholic Responses to Laudato Si", Journal of Moral Theology, Vol. 9, Special Issue 1, 1-18, 2020
  • "Laudato Si in the United States: Reflections on Love, Charitable Works, and Social Justice", Journal of Moral Theology, Vol. 9, Special Issue 1, 90-103, 2020
  • "What is Happening to Our Common Home? Considerations from a Catholic Climate Scientist and a Catholic Theological Ethicist", Journal of Moral Theology, Vol. 9, Special Issue 1, 71-89, 2020
  • "Climate Justice: Essential to the Church's Mission", Journal of Religion and Society, Supplement 21, 178-202, 2020
  • "Catholic Social Teaching, Love, and Thomistic Secondary Moral Precepts", Journal of Moral Theology, Vol. 8, no. 2, 67-90, 2019
  • "Should Catholics Drink the Tea? Reflections on the Tea Party Movement in Light of Gaudium et Spes", Horizons, Vol. 42, no. 2, 317-340, 2015
  • "Faithful Citizenship in the Age of Climate Change: Why U.S. Catholics Should Advocate for a National Carbon Tax", Journal of Catholic Social Thought, Vol. 11, no. 2, 431-464, 2014

Editing and Reviews

  • "Laudato Si and the U.S. Catholic Church: A Conference Series on Our Common Home", Journal of Moral Theology, Vol. 9, Special Issue 1, 2020
  • All Creation Is Connected: Voices in Response to Pope Franciss Encyclical on Ecology, Anselm Academic Press, 2018
  • “Reframing Catholic Theological Ethics by Joseph A. Selling", Horizons, Vol. 44, no. 2, 481-483, 2017
  • "On Care for Our Common Home, Laudato Si': The Encyclical of Pope Francis on the Environment with Commentary by Sean McDonagh", Theological Studies, Vol. 78, no. 2, 517-519, 2017
  • "Entering the dialogue - Abounding in Kindness: Writings for the People of God by Elizabeth A. Johnson", America, Vol. 213, no. 15, 36, 2016
  • "Law, Virtue, and Justice by Amalia Amaya, Hock Lai Ho, editors", Political Theology, Vol. 16, no. 3, 287-289, 2015
  • “Following St. Francis- Review of Following St. Francis: John Paul II’s Call for Ecological Action by Marybeth Lorbiecki", US Catholic, Vol. 79, no. 10, 43, 2014


  • Frederic and Emma Schemmel Endowed Lecture in Theology at Clarke University, "Climate Change and Catholicism: Climate Justice as Essential to Catholic Mission", 2021
  • Catholic Climate Covenant, "I'm Catholic, How Should I Discern? Conscience, Discernment, and Voting as an Act of Love." Webinar with Jill Rauh, U.S. Conference of Catholic Bishops and Brenna Davis, Ignatian Solidarity Network., 2020
  • Catholic Climate Covenant, "Catholic Social Teaching, Politics, and the Fullness of Faith." Webinar with Most Reverend John E. Stowe, OFM Conv., bishop of Lexington., 2020
  • Adamah Symposium at Mount Marty College, "Creation Care and Catholic Social Teaching", 2020
  • 2020 Midwest Sociological Society Annual Meeting, "U.S. Bishops, Climate Change, and Controversial Organizational Messages (Failing to) Filter Down" with Sabrina Danielsen and Emily E. Burke., 2020
  • 2020 Kripke Center for the Study of Religion & Society Annual Symposium, “U.S. Catholic Bishops’ Discussion of President Obama and President Trump, 2014–2019" with Sabrina Danielsen and Emily E. Burke., 2020
  • Society for the Scientific Study of Religion 2019 Annual Meeting, “The Duty to Teach: U.S. Bishops, Climate Change, and Catholic Social Teaching” with Sabrina Danielsen and Emily E. Burke., 2019
  • Jay Phillips Center for Interfaith Learning and the Nicholas and Bernice Reuter Professorship in Science and Religion at College of Saint Benedict/Saint John's University, "Climate Change as Religious, Ethical and Political: Interfaith Reflections with Emphasis on U.S. Catholicism", 2019
  • 2019 Kripke Center for the Study of Religion & Society Annual Symposium, “Climate Justice: Constitutive of or Integral to the Church’s Mission?”, 2019
  • Laudato Si’ and Northern Appalachia: A Conference on the Environment and Catholic Social Teaching at Saint Vincent College, "Laudato Si’, Public Theology and Northern Appalachia: Shaping Energy Discourse and Policy.", 2016
  • Public Theology and the Global Common Good: The Contribution of David Hollenbach, SJ, "The Future of Public Theology," panelist., 2016
  • 2016 Catholic Theological Society of America Annual Convention session Laudato Si’, Justice, and Mercy: Seeking the Common Good for Our Common Home, poster "Laudato Si’ and Climate Change: American Opinions, Caribbean Concerns.", 2016
  • Laudato Si' - Everything is Connected: Teaching Pope Francis' Integral Ecology' at the University of Dayton, "Individual Practices and Laudato Si: One Side of the Coin.", 2016
  • 2015 College Theology Society Annual Meeting, "Public Theology Then and Now: Lessons for Pope Francis’ Encyclical on Ecology from The Challenge of Peace and Economic Justice for All.", 2015
  • 2015 College Theology Society Annual Meeting, "New Pedagogies and Spirituality of Learning," panelist., 2015
  • 2015 New England-Maritimes American Academy of Religion (NEMAAR) Regional Meeting, "Catholic Liberation Ecology Changes Everything: Pope Francis, Leonardo Boff and Naomi Klein.", 2015
  • Loyola University Chicago Second Annual Climate Change Conference, "Jesuit Schools and the Jesuit Pope: How Jesuit Colleges Can Respond to Pope Francis’ Ecological Message," panelist., 2015
  • 2014 American Academy of Religion Annual Meeting, "Catholic Policy Criteria for U.S. Climate Change Mitigation: Recommendations from Thomistic Virtue Ethics and Catholic Social Teaching.", 2014
  • Catholic Health Care Ethics Conference at Loyola University Chicago, "Healthy People, Healthy Planet: Pope Francis’ Ecological Vision and the Impact on Catholic Healthcare.", 2014
  • 2014 New England-Maritimes American Academy of Religion (NEMAAR) Regional Meeting, "Climate Change Policy and the Virtues of Autonomy and Solidarity.", 2014
  • On Fire at the Frontiers: International Conference on the Commitment to Justice in Jesuit Higher Education, "Catholic, Jesuit Mission-Based Sustainability in Higher Education.", 2013
  • Prophets on the Borders: The Challenge of Evangelization Today hosted by Pax Romana-ICMICA, BC TGSA, Emerging Theologians, and The Inner Room, "Reading the Signs of the Times: Connecting Climate Change, Environmental Refugees, and the New Evangelization.", 2013
  • 2013 College Theology Society Annual Convention, "Recognizing Climate Change as a Pro-Life Issue in Catholic Theology.", 2013
  • Catholic Social Tradition Conference- Peace Yesterday, Today, and Tomorrow: Celebrating 50 Years since Pacem in Terris at the University of Notre Dame, "Learning How to Care for Climate Change Refugees from Pope John XXIII and Pope Benedict XVI.", 2013
  • 2013 Catholic Campus Ministry Association National Convention, "Campus Ministry and Catholic Mission-Based Sustainability.", 2013
  • 2012 Association of Catholic Colleges and Universities Mission Officer Conference, "Sustainability and Catholic Higher Education: A Toolkit for Mission Integration.", 2012
  • Archdiocese of Boston 3rd Annual Justice Convocation, "Environmental Justice.", 2011
  • 2011 Association for the Advancement of Sustainability in Higher Education (AASHE) Annual Conference, "Grounding Sustainability in Faith-Based Mission and Identity.", 2011
  • 2009 National Catholic Youth Conference (NCYC), "What Does Climate Change Have to Do with My Catholic Faith?", 2009
  • Power Shift 2009, "Faith, Justice, Morality, and Climate Change," panelist., 2009

Research and Scholarship

Research and Scholarship Interests

  • Dr. DiLeo’s research and scholarship focus on Catholic social teaching and climate change with particular focus on Pope Francis’s encyclical Laudato Si’.

Current Research Projects

  • Dr. DiLeo's current research explores the reception of Laudato Si', especially among the U.S. Catholic bishops. He is also conducting research on the history of papal environmental teaching.

Grant Funding Received

  • “The Duty to Teach: U.S. Bishops, Laudato Si’, and Catholic Social Teaching”
  • “Climate Change and Laudato Si’: A Study of U.S. Catholic Bishops, Priests, and Parishes”
  • “The Social Mission of the Catholic Church”
  • “The Duty to Teach: U.S. Bishops, Laudato Si’, and Catholic Social Teaching”
  • “Laudato Si’ in the United States: Constructing a Public Theology”