Immanuel Kant

Immanuel Kant was a German philosopher of the Enlightenment who is regarded as one of the most influential thinkers in the history of Western philosophy. His work on epistemology, ethics, and aesthetics shaped the development of modern philosophy.

Early Life and Education

Kant was born in 1724 in Königsberg, in East Prussia, and he spent almost his entire life in the city. He was raised in a pious Protestant family and educated at the Collegium Fridericianum.

He studied at the University of Königsberg and worked as a private tutor before becoming a lecturer. He was appointed professor of logic and metaphysics in 1770.

He lectured on a wide range of subjects, including physics, anthropology, and geography. He was known for his orderly habits and for his devotion to his work.

The Critique of Pure Reason

The Critique of Pure Reason, published in 1781, is his major work of epistemology. It sought to reconcile the rationalism of Leibniz and Descartes with the empiricism of Locke and Hume.

Kant argued that the mind is not a passive recipient of experience but an active organiser of it. Space, time, and the categories are the forms through which we perceive and understand the world.

The distinction between the phenomenal world, as it appears to us, and the noumenal world, as it is in itself, is central to his philosophy. The work inaugurated the critical philosophy and transformed the course of Western thought.

Ethics

The Groundwork of the Metaphysics of Morals and the Critique of Practical Reason set out his ethical theory. He argued that morality is based on reason and not on inclination or on consequences.

The categorical imperative requires that we act only on maxims that could be willed as universal laws. The second formulation requires that we treat humanity always as an end and never merely as a means.

He argued that the moral law is given a priori and that it issues in a duty. The theory is a form of deontology and is opposed to utilitarianism.

Aesthetics and Other Works

The Critique of Judgment treats aesthetic and teleological judgment. Kant analysed the experience of beauty and of the sublime and argued that aesthetic judgments are both subjective and universal.

The work also considers the purposiveness of nature and the role of the concept of the organism. It influenced the development of German idealism and of the romantic movement.

His other works include Religion within the Bounds of Bare Reason and Perpetual Peace. The latter proposes a federation of states as a condition of lasting peace.

Later Life and Legacy

Kant's later years were marked by failing health and by a dispute with the Prussian government over religion. He died in 1804 and his last words were recorded as sweet enough.

His influence on the subsequent history of philosophy has been profound. The German idealists, including Fichte, Schelling, and Hegel, developed his ideas.

His ethics and his epistemology remain central to philosophical debate. He is regarded as the pivotal figure of modern philosophy.

The Copernican Revolution

Kant compared his achievement to the revolution of Copernicus. He argued that objects must conform to our knowledge rather than our knowledge to objects.

The things that we can know are the appearances that are structured by the forms of intuition and by the categories. The thing in itself is unknowable.

The position is a form of transcendental idealism. It resolved the dispute between the rationalists and the empiricists and set a new agenda for philosophy.

The Antinomies and the Limits of Reason

Kant identified a series of antinomies, or contradictions, into which reason falls when it goes beyond experience. The antinomies concern the beginning of the world, the divisibility of matter, freedom, and the existence of God.

He used the distinction between appearance and thing in itself to resolve some of the antinomies. The resolution set limits to theoretical reason and made room for practical faith.

The analysis of the limits of reason is one of his most important contributions. It was developed by the German idealists and by the neo-Kantians.

The Moral Philosophy

The categorical imperative is the supreme principle of morality. The first formulation requires that we act only on maxims that could become universal laws.

The second formulation requires that we treat humanity, in ourselves and in others, always as an end and never merely as a means. The principle has been influential in the theory of human rights.

Kant argued that the moral law is discovered by reason and that it is binding on all rational beings. His theory is a form of deontology and is opposed to consequentialism.

The Philosophy of History

Kant wrote essays on history and on politics, including the Idea for a Universal History and Perpetual Peace. He argued that history can be understood as the progressive realisation of reason.

Perpetual Peace proposes a federation of free states bound by international law. The essay anticipates the development of the League of Nations and of the United Nations.

He also wrote on the philosophy of law and on the relation between morality and politics. His work influenced the development of international law.

The Legacy

Kant's influence on philosophy has been immense. The German idealists developed his ideas, and the neo-Kantians of the nineteenth and twentieth centuries interpreted his work.

His ethics and his epistemology remain central to contemporary debate. The analytic tradition has engaged closely with his arguments.

He is regarded as one of the greatest philosophers in the Western tradition. His name is associated with the critical method and with the search for the conditions of knowledge and of morality.

See also

• Categorical imperative
• Transcendental idealism