Professor Wallace works in moral philosophy, and his interests extend to all parts of the subject (including its history), and to such allied areas as political philosophy, philosophy of law, and philosophy of action. His research has focused on responsibility, moral psychology, normative ethics, and the theory of practical reason. Recently he has written on promising, normativity, constructivism, resentment, hypocrisy, love, and regret and affirmation, among other topics. His newest book, The Moral Nexus, is a study of the relational structure of the moral domain. Other books include Responsibility and the Moral Sentiments, Normativity and the Will, and The View from Here: On Affirmation, Attachment, and the Limits of Regret. He has taught at Wesleyan University, the University of Pennsylvania, and the Humboldt-Universität zu Berlin.