...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 ...

..., 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 ...

...ason, 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 expe...