My publications focus primarily on medieval philosophy, especially Thomas Aquinas, John Duns Scotus, metaphysics, causation, modality, and philosophical theology. Titles link to the official published versions.
Books
2022. Aquinas on Efficient Causation and Causal Powers. Cambridge: Cambridge University Press
Journal Articles
2025. “Aquinas on Varieties of Necessity.” New Blackfriars (special issue for the 800th anniversary of Aquinas’s birth) 106 (6): 492–508.
2021. “Aquinas on Passive Powers.” Vivarium 59 (1–2): 33–51.
2020. “What Is an Action? Peter Auriol vs. Thomas Aquinas on the Metaphysics of Causality.” Ergo 6 (43): 1259–85.
2019. “Aquinas on the Intension and Remission of Accidental Forms.” Oxford Studies in Medieval Philosophy 7: 116–46.
2018. “Aquinas’s Ontology of Transeunt Causal Activity.” Vivarium 56: 1–36.
2014. “Peter Olivi’s Rejection of God’s Concurrence with Secondary Causes.” British Journal for the History of Philosophy 22 (4): 655–79.
2014. “Aquinas and Scotus on the Source of Contingency.” Oxford Studies in Medieval Philosophy 2: 46–66.
2012. “Thomas Bradwardine on God and the Foundations of Modality.” British Journal for the History of Philosophy 21 (2): 368–80. (Awarded the Society for Medieval and Renaissance Philosophy’s 2012 Founder’s Prize.)
2010. “Thomas Aquinas on the Perpetual Truth of Essential Propositions.” History of Philosophy Quarterly 27 (3): 197–213.
2010. “John Duns Scotus on God’s Knowledge of Sins: A Test Case for God’s Knowledge of Contingents.” Journal of the History of Philosophy 48 (1): 15–34.
2007. “Thomas Aquinas on Truths about Nonbeings.” Proceedings of the American Catholic Philosophical Association 80: 101–13.
Book Chapters
In progress. “Duns Scotus on Causation.” In The Oxford Handbook of John Duns Scotus, edited by T. Ward. Oxford: Oxford University Press.
Submitted. “God’s Knowledge, Will, Providence,Predestination et al.—qq. 14–26.” In The Oxford Handbook of the Summa Theologiae, edited by T. S. Cory, M. Levering, and T. J. White, OP. Oxford: Oxford University Press.
Forthcoming. “Divine Power, Knowledge and Will.” In The Oxford Handbook of Medieval Franciscan Thought, edited by A. Rosato and L. Schumacher. Oxford: Oxford University Press.
Forthcoming. “Dispositional Modality and Failures of Natural Causes Due to Weakness.” In Aquinas at 800: Commemorative Studies, 1225–2025, edited by D. Cory, T. S. Cory, J. O’Callaghan, and M. Waddell. Washington, DC: The Catholic University of America Press.
Forthcoming. “Primary and Secondary Causation and the Act of Sin: Does Privation Theory Save God from Causing Evil?” In Primary and Secondary Causality in Medieval Philosophy, edited by D. Calma, T. Hoffmann, and T. Vitale. London: Routledge.
Forthcoming. “Primary and Secondary Causality.” In Critical Guide to Thomas Aquinas’s Summa Contra Gentiles, edited by T. Nevitt and T. Osborne. Cambridge: Cambridge University Press.
2026. “Aquinas and Contemporary Philosophy on Causation.” In Thomism Revisited, edited by Gaven Kerr. Cambridge: Cambridge University Press, 7–23.
2024. “Essence in Medieval Philosophy.” In Routledge Handbook of Essence, edited by K. Koslicki and M. Raven. London: Routledge, 30–40.
2024. “Aquinas on How Accidental Forms Vary in Themselves.” In Summa metaphysicae ad mentem Sancti Thomae: Essays in Honor of John F. Wippel (Studies in Philosophy and the History of Philosophy), edited by T. S. Cory and G. Doolan. Washington, DC: The Catholic University of America Press, 207–24.
2022. “Three Competing Views of God’s Causation of Creaturely Actions: Aquinas, Scotus, and Olivi.” In Divine Causation, edited by G. Ganssle. New York: Routledge, 66–81.
2022. “Duns Scotus on How God Causes the Created Will’s Volitions.” In Interpreting Scotus, edited by G. Pini. Cambridge: Cambridge University Press, 78–101.
2020. “Medieval Aristotelians on Congenital Disability and Their Early Modern Critics.” In Disability in Medieval Philosophy, edited by S. Williams. New York: Routledge, 51–79.
Submitted. “Propositions.” In Bloomsbury Companion to Aquinas, edited by J. Haldane and J.O’Callaghan. Bloomsbury Academic.
Submitted. “Truth.” In Bloomsbury Companion to Aquinas, edited by J. Haldane and J. O’Callaghan. Bloomsbury Academic.
Encyclopedia Articles
2026. “Causality.” Encyclopedia of Catholic Theology.
2025. “Medieval Theories of Future Contingents.” Stanford Encyclopedia of Philosophy. Primary co-author with S. Knuuttila.
Edited Volumes
In progress. Duns Scotus and His Legacy: A Festschrift in Honor of Stephen D. Dumont. Co-edited with G. Smith. Leiden: Brill.
Translations
2015. “Gaunilo’s Reply to Anselm.” Reason and Responsibility, 16th edition, edited by J. Feinberg and R. Shafer-Landau. Cengage, 33–36.
Reviews and Reports
2016. “Report on Workshop on Medieval Natural Philosophy.” Bulletin de philosophie médiévale 58: 4–8.
2010. Review of Joseph Koterski’s Introduction to Medieval Philosophy: Basic Concepts (Wiley-Blackwell, 2008). American Catholic Philosophical Quarterly 84 (4): 814–17
Gloria Frost 