This lecture was given at Brown University on February 20, 2020.

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Prof. John O'Callaghan is the Director of the Jacques Maritain Center at the University of Notre Dame as well as a permanent member of the Pontifical Academy of St. Thomas Aquinas, appointed by Pope Benedict XVI in 2010. He served as the past President of the American Catholic Philosophical Association. His areas of scholarly interest include Medieval Philosophy, the philosophy of St. Thomas Aquinas, and Thomistic Metaphysics and Ethics.

Prof. O'Callaghan earned his BS in Physics from St. Norbert College in 1984, an MS in Mathematics from the University of Notre Dame in 1986, and his PhD in Philosophy from the University of Notre Dame in 1996.