This seminar in moral and legal philosophy will investigate the concept of legal authority and its relationship to human rights. The seminar will have three parts. The first will lay the groundwork for an account of authority in the theory of moral reason. We will investigate the concept of an exclusionary or binding reason, in preparation to understand a legal authority’s claim to offer such reasons through their directives. The second part of the seminar will focus on legal authority in particular and will examine various attempts to dissolve the paradox about legal authority. The third part seeks to bring together the first two and to resolve the puzzle by reflecting on the relationship of human rights to legal authority.