On The Metaphysics of Morals and Ethics: Groundwork of the Metaphysics of Morals, Introduction to the Metaphysic of Morals, The Metaphysical Elements of Ethics
Collected here are Kant's three most important works on the Metaphysics of Morals & Ethics: Groundwork of the Metaphysics of Morals, Introduction to the Metaphysic of Morals & The Metaphysical Elements of Ethics. Groundwork of the Metaphysics of Morals is a most important work in modern moral philosophy. It belongs beside Plato, Aristotle, Machiavelli & Hobbes. Here he articulates & defends the Categorical Imperative-the fundamental principle underlying moral reasoning-& to lay a foundation for a comprehensive account of justice & human virtues. Introduction to the Metaphysic of Morals states: "All duties are either duties of right, that is, juridical duties, or duties of virtue, that is, ethical duties. Juridical duties are such as may be promulgated by external legislation; ethical duties are those for which such legislation is not possible." Metaphysical Elements of Ethics states: "If there exists on any subject a philosophy (that is, a system of rational knowledge based on concepts), then there must also be for this philosophy a system of pure rational concepts, independent of any condition of intuition, in other words, a metaphysic. It may be asked whether metaphysical elements are required also for every practical philosophy, which is the doctrine of duties, & therefore also for Ethics."
Immanuel Kant was an 18th-century philosopher from Königsberg, Prussia (now Kaliningrad, Russia). He's regarded as one of the most influential thinkers of modern Europe & of the late Enlightenment. His most important work is The Critique of Pure Reason, an investigation of reason itself. It encompasses an attack on traditional metaphysics & epistemology, & highlights his own contribution to these areas. Other main works of his maturity are The Critique of Practical Reason, which is about ethics, & The Critique of Judgment, about esthetics & teleology.
Pursuing metaphysics involves asking questions about the ultimate nature of reality. Kant suggested that metaphysics can be reformed thru epistemology. He suggested that by understanding the sources & limits of human knowledge we can ask fruitful metaphysical questions. He asked if an object can be known to have certain properties prior to the experience of that object. He concluded that all objects that the mind can think about must conform to its manner of thought. Therefore if the mind can think only in terms of causality–which he concluded that it does–then we can know prior to experiencing them that all objects we experience must either be a cause or an effect. However, it follows from this that it's possible that there are objects of such a nature that the mind cannot think of them, & so the principle of causality, for instance, cannot be applied outside experience: hence we cannot know, for example, whether the world always existed or if it had a cause. So the grand questions of speculative metaphysics are off limits, but the sciences are firmly grounded in laws of the mind. Kant believed himself to be creating a compromise between the empiricists & the rationalists. The empiricists believed that knowledge is acquired thru experience alone, but the rationalists maintained that such knowledge is open to Cartesian doubt and that reason alone provides us with knowledge. Kant argues, however, that using reason without applying it to experience will only lead to illusions, while experience will be purely subjective without first being subsumed under pure reason. Kant’s thought was very influential in Germany during his lifetime, moving philosophy beyond the debate between the rationalists & empiricists. The philosophers Fichte, Schelling, Hegel and Schopenhauer saw themselves as correcting and expanding Kant's system, thus bringing about various forms of German Idealism. Kant continues to be a major influence on philosophy to this day, influencing both Analytic and Continental philosophy.