David Ruel Foster, Ph.D. 

Professor of Philosophy 


Ph.D.; Ph.L., Catholic University of America 

S.T.B., Dominican House of Studies 

B.A., University of Notre Dame 

Research Interests 

Metaphysics; Catholic philosophy, especially Aquinas 


Dr. David Foster has taught philosophy at Mount St. Mary’s since 2010. He previously held teaching assignments at Seton Hall, the Catholic University of America and Marymount University. Dr. Foster holds both a licentiate and doctorate in philosophy from the Catholic University of America and a baccalaureate in sacred theology from the Dominican House of Studies. 

The author of numerous articles and reviews, Dr. Foster’s research has focused on the problems of metaphysical structure and the philosophy of person. In 2002, he co-edited and contributed to The Two Wings of Catholic Thought: Essays on Fides et Ratio. He has also written and taught on the role of philosophy in theology. 

Dr. Foster is an active member of the American Catholic Philosophical Association. 

Selected Publications 

“Fides et ratio’s Lessons for Philosophers.” International Philosophical Quarterly 63, no. 1 (March 2023): 43-56.

“The Implications of Fides et Ratio for Catholic Universities,” in The Two Wings of Catholic Thought: Essays on Fides Et Ratio, ed. David Ruel Foster and Joseph W. Koterski S.J. (Washington, DC: The Catholic University of America Press, 2003) 109–126.