Kantianism
Kantianism is the philosophy of Immanuel Kant, a German philosopher born in Königsberg, Prussia (now Kaliningrad, Russia). The term "Kantianism" or "Kantian" is sometimes also used to describe contemporary positions in philosophy of mind, epistemology, and ethics.
Kantian ethics
The social contract theory of political philosopher John Rawls, developed in his work "A Theory of Justice", was influenced by Kant's ethics. Rawls argued that a just society would be fair. To achieve this fairness, he proposed a hypothetical moment prior to the existence of a society, at which the society is ordered: this is the original position. This should take place from behind a veil of ignorance, where no one knows what their own position in society will be, preventing people from being biased by their own interests and ensuring a fair result. Rawls' theory of justice rests on the belief that individuals are free, equal, and moral; he regarded all human beings as possessing some degree of reasonableness and rationality, which he saw as the constituents of morality and entitling their possessors to equal justice. Rawls dismissed much of Kant's dualism, arguing that the structure of Kantian ethics, once reformulated, is clearer without it—he described this as one of the goals of "A Theory of Justice".