The Critique of Pure Reason, first published in 1781 with a second edition in 1787, has been called the most influential and important philosophical text of the modern age.

Kant saw the Critique of Pure Reason as an attempt to bridge the gap between rationalism (there are significant ways in which our concepts and knowledge are gained independently of sense experience) and empiricism (sense experience is the ultimate source of all our concepts and knowledge) and, in particular, to counter the radical empiricism of David Hume (our beliefs are purely the result of accumulated habits, developed in response to accumulated sense experiences). Using the methods of science, Kant demonst...

The Fundamental Principles of the Metaphysic of Morals, also known as The Groundwork of the Metaphysics of Morals or Foundations of the Metaphysics of Morals or Grounding of the Metaphysics of Morals, is Immanuel Kant's first contribution to moral philosophy. It argues for an a priori basis for morality. Where the Critique of Pure Reason laid out Kant's metaphysical and epistemological ideas, this relatively short, primarily meta-ethical, work was intended to outline and define the concepts and arguments shaping his future work The Metaphysics of Morals. However, the latter work is much less readable than the Fundamental Principles.

This essay, written in 1795, puts forth a plan for a lasting peace between nations and peoples. Kant puts forth necessary means to any peace, and argues that nations can be brought into federation with one another without loss of sovereignty. In one translation, telling of the historical impact of this essay, this federation is called a “league of nations.” The supplements and appendices are of considerable interest on their own. The supplements contain an argument regarding the use which nature makes of war, and the way in which nature, in the end, impels us towards peace. The appendices return to the question of whether his theory is mere theory, or whether it bears translation into pra...

The Critique of Practical Reason (Kritik der praktischen Vernunft) is the second of Immanuel Kant’s three critiques, first published in 1788. It follows on from his Critique of Pure Reason and deals with his moral philosophy. The second Critique exercised a decisive influence over the subsequent development of the field of ethics and moral philosophy, becoming the principle reference point for ethical systems that focus on the rightness or wrongness of actions themselves, as opposed to the rightness or wrongness of the consequences of those actions. Subsequently termed “deontological ethics”, Kant’s ethical system also laid the groundwork of moral absolutism, the b...

This essay of Kant’s on copyright argues that the unlicensed copying of books cannot possibly be permissible, due to the fact that it assumes a consent on the part of the author which it is logically impossible for the author to give. The argument is dependent upon an assumption that the writings be commodified, for the reason why the author is unable to possibly give consent to multiple publishers is due to the author’s will – to communicate with the public – necessitating the profitability of the publisher, for, it is assumed, there is no way to communicate with the public at large without a great expense which can only be borne by a publishing firm. This is, of course, no longer a n...

This tripartite essay, published variously as On the Popular Judgment (J. Richardson trans.), On the Old Saw (E.B. Ashton trans.), or On the Common Saying (both M.J. Gregor and H.B. Nisbet), Kant takes up the issue of the relation of theory to practice in three distinct ways. In the first, he replies to Christian Garve’s criticism of his moral theory, in the second, he distances himself from Thomas Hobbes, and in the third, Moses Mendelssohn. The three taken together are representative of the breadth of Kant’s moral and political thought; the first section being concerned with the individual, the second with the state, and the third with the species. Although this ...

This essay, written in 1795, puts forth a plan for a lasting peace between nations and peoples. Kant puts forth necessary means to any peace, and argues that nations can be brought into federation with one another without loss of sovereignty. In one translation, telling of the historical impact of this essay, this federation is called a “league of nations.” The supplements and appendices are of considerable interest on their own. The supplements contain an argument regarding the use which nature makes of war, and the way in which nature, in the end, impels us towards peace. The appendices return to the question of whether his theory is mere theory, or whether it bears translation into ...

In der Abhandlung „Zum ewigen Frieden” wendet Kant die Grundsätze seiner Moralphilosophie auf die Beziehungen zwischen Staaten an. Er stellt klar, dass Frieden kein natürlicher Zustand sei und deshalb gestiftet werden müsse. Um das Ziel „Weltfrieden“ zu verwirklichen, müssten sich die Staaten einem allgemein verbindlichen Völkerrecht unterordnen. In seinen Bestimmungen und Erläuterungen nimmt Kant zahlreiche Entwicklungen hin zum modernen Völkerrecht vorweg.
In his essay “Perpetual Peace”, Kant applies the principles of his moral philosophy to the relations between nations. He points out that peace is not a natural state and therefore must be instituted through human effort. To ma...