Harvard Professor Thomas Scanlon is best known for his explorations of rights, freedom of expression, and contractualist moral theory. His work has largely been motivated by two central topics: how we assess the moral rightness of an action, and why we give moral considerations priority in guiding our actions. He has published widely on freedom of expression, the nature of rights, conceptions of welfare, and theories of justice, as well as on foundational questions in moral theory. (#12437)