This lecture was given on September 15, 2022 at the University of North Carolina at Chapel Hill. For information on upcoming events, please visit our website at www.thomisticinstitute.org. About the speaker: Stephen L. Brock is a priest of the Prelature of Opus Dei (ordained 1992). He is Ordinary Professor of Medieval Philosophy at the Pontifical University of the Holy Cross in Rome, where he has taught since 1990. He received a BA from the University of Chicago and a PhD in Medieval Studies from the University of Toronto. In 1999 he was a visiting professor in the School of Philosophy of The Catholic University of America. In 2017 he is a visiting scholar at the University of Chicago, collaborating in the Templeton Foundation project “Virtue, Happiness, and Meaning in Life,” directed by Candace Vogler and Jennifer Frey; his collaboration has included teaching a course in the Philosophy Department at the University of Chicago, giving two public lectures, directing a reading group, and leading sessions in a summer seminar for graduate students. Since 2008 he has been an Ordinary Member of the Pontifical Academy of St. Thomas Aquinas. He is the author of Action & Conduct: Thomas Aquinas and the Theory of Action (T&T Clark, 1998); articles on various aspects of Aquinas’s thought; and most recently, The Philosophy of Saint Thomas Aquinas: A Sketch (Wipf & Stock, 2015).