The Metaphysics of Morals () is a 1797 work of political and moral philosophy by Immanuel Kant. In structure terms, it is divided into two sections: the Doctrine of Right, dealing with rights, and the Doctrine of Virtue, dealing with virtues. Kant's development of his ethical theories in the work include an evolution of the "categorical imperative" concept and an exploration of the consequences of treating humanity as rational beings in the context of duties. Summary The work is divided into two main parts, the Rechtslehre and the Tugendlehre. Mary J. Gregor's translation (1991) explains these German terms as, respectively, the Doctrine of Right, which deals with the rights that people have or can acquire, and the Doctrine of Virtue, which deals with the virtues they ought to acquire. Rechtslehre has also been translated as the Science of Right (Hastie) or the Metaphysical Elements of Justice (Ladd). It is grounded in republican interpretation of origins of political community as civil society and establishment of positive law. Published separately in 1797, the Doctrine of Right is one of the last examples of classical republicanism in political philosophy. The Doctrine of Right contains the most mature of Kant's statements on the peace project and a system of law to ensure individual rights. The Doctrine of Virtue develops further Kant's ethical theory, which Kant first laid out in the Groundwork of the Metaphysics of Morals (1785). Kant particularly emphasizes treating humanity as an end in itself; in fact Kant's retake of the second formulation of the categorical imperative (e.g. Groundwork of the Metaphysics of Morals) makes it possible to deduce duties. The duties are analytically treated by Kant, who distinguishes duties towards ourselves from duties towards others. The duties are classified as perfect duties and imperfect duties. Kant thinks imperfect duties allow a latitudo, i.e., the possibility of choosing maxims. The perfect duties instead do not allow any latitudo and determine exactly the maxims of actions. Thus, Kant distinguishes "Virtue" and "Right": the "Doctrine of Right" contains rights as perfect duties towards others only. Influence In the English-speaking world, the Metaphysics of Morals (1797) is not as well known as Kant's earlier works, the Groundwork of the Metaphysics of Morals (1785) and the Critique of Practical Reason (1788), but it has experienced a renaissance through the pioneering work of Mary J. Gregor. English translations Translations of the entire book: Kant, Immanuel. The Metaphysics