Prof. Thomas Osborne argues that, on an Aristotelian–Thomistic account of human nature, it is never truly good for you to be bad, because vice damages your very being as a rational, social creature ordered to common goods and ultimately to God.This lecture was given on October 29th, 2025, at University of Pittsburgh.For more information on upcoming events, visit us at thomisticinstitute.org/upcoming-events.About the Speakers: Thomas M. Osborne, Jr. (Ph.D, Duke University, 2001) is the Frank A. Rudman Endowed Chair in Philosophy and the Chair of the Department of Philosophy at the University of St. Thomas. He has published widely on Thomas Aquinas, Thomism, and medieval and late scholastic philosophy. His interests cover moral psychology, ethics, political philosophy, and metaphysics. His latest book is Thomas Aquinas on Virtue (Cambridge University Press, 2024).Keywords: Aristotelian Natural Law, Common Good, Human Dignity, Justice And Self-Interest, Moral Rectitude, Natural Law Theory, Plato’s Republic, Political Community, Prudence And Charity, Vice And Human Defectiveness

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