This course is for students who are studying moral philosophy for the first time. As long as there have been human beings, morality has been a question—its foundations, its nature, its forms, and its very possibility. By studying classic works of philosophy, especially Plato’s Republic, Aristotle’s Nicomachean Ethics, and St. Thomas Aquinas’s Summa Theologica, students will engage with the most fundamental questions that motivate ethical reflection: What does it mean to be human? What makes for a good life? How shall we live? What is the relationship between morality and happiness? The course will focus particular attention on the riches of the Catholic intellectual tradition and its emphasis on practical reasoning, the dignity of the person, virtue ethics, and the natural law.