This document discusses concepts of rights and duties. It defines a right as an individual's entitlement to act in a certain way or have others act toward them. Legal rights are derived from legal systems, while moral rights (also called human rights) are based on moral principles and apply universally. Moral rights impose duties on others that allow individuals freedom of choice. They are correlated with duties and provide autonomy, equality, and basis for justifying actions. The document also discusses contractual rights/duties, Kant's theory of categorical imperative as a basis for moral rights, and problems with Kant's theory.