This book provides an analysis of major ethical and bioethical issues like euthanasia, suicide, organ commerce and donation, sexual objectification, and abortion from the perspective of Kant’s moral theory. It deals with questions such as: Is the person who decides to commit suicide autonomous? Is euthanasia compatible with respect for humanity and dignity? Can a person’s choice to sell one of her kidneys be free? Does the prostitute reduce herself to a mere sexual object through satisfying her clients’ desires? Can the fetus’ potential for rational agency constitute an argument against abortion? Without doubt, Kant’s is one of the most important moral theories. The task of applying it to issues that concern us today leaves us with a sense of satisfaction that it has a lot to offer to contemporary philosophical thought.