Immanuel Kant
Kant developed his moral philosophy in three works: "Groundwork of the Metaphysic of Morals" (1785), "Critique of Practical Reason" (1788), and "Metaphysics of Morals" (1797).
Critique of Pure Reason
The Critique of Pure Reason () is a 1781 book by the German philosopher Immanuel Kant, in which the author seeks to determine the limits and scope of metaphysics. A heavily-revised second edition was published in 1787. Also referred to as Kant's "First Critique", it was followed by the "Critique of Practical Reason" (1788) and the "Critique of Judgment" (1790). In the preface to the first edition, Kant explains that by a "critique of pure reason" he means not "a critique of books and systems, but of the faculty of reason in general, in respect of all knowledge after which it may strive "independently of all experience"" and that he aims to reach a decision about "the possibility or impossibility of metaphysics". The First Critique is often viewed as culminating several centuries of early-modern philosophy, and inaugurating modern philosophy.