Immanuel Kant
Immanuel Kant (; ; 22 April 1724 – 12 February 1804) was a German philosopher who is a central figure in modern philosophy. In his doctrine of transcendental idealism, he argued that space, time and causation are mere sensibilities; "things-in-themselves" exist, but their nature is unknowable. In his view, the mind shapes and structures experience, with all human experience sharing certain structural features. He drew a parallel to the Copernican revolution in his proposition that worldly objects can be intuited "a priori" ("beforehand"), and that intuition is therefore independent from objective reality. Kant believed that reason is the source of morality, and that aesthetics arise from a faculty of disinterested judgment. Kant's views continue to have a major influence on contemporary philosophy, especially the fields of epistemology, ethics, political theory, and post-modern aesthetics.
History of ethics
Immanuel Kant, in the 18th century, argued that right and wrong are founded on duty, which issues a Categorical Imperative to us, a command that, of its nature, ought to be obeyed. An action is only truly moral if done from a sense of duty, and the most valuable thing is a human will that has decided to act rightly. To decide what duty requires, Kant proposes the principle of universalizability: correct moral rules are those everyone could adopt.