Final answer:
John Rawls posits that societal principles are just and fair if chosen from behind a veil of ignorance, and introduces the liberty and difference principles to guide the creation of such a society. His theory aligns with egalitarianism and supports a welfare state providing equal opportunity.
Step-by-step explanation:
John Rawls believes that the principles governing a society will be just and fair if they are chosen behind a veil of ignorance. This concept is a key feature of his theory of justice, which advocates that in designing a society, individuals should do so from an original position where they are unaware of their own personal circumstances. Rawls introduces two fundamental principles for structuring society: the liberty principle, which ensures equal basic freedoms for all, and the difference principle, which allows for social and economic inequalities only if they are of the greatest benefit to the least advantaged and attached to positions open to all under fair equality of opportunity.
Rawls's theory shares elements with egalitarianism, suggesting all individuals deserve equal status and moral worth. His approach is considered unique for its method in moral and ethical reasoning, where he asks what rational beings would decide if they did not know their own status in the system. Throughout his work, Rawls emphasizes the importance of arranging a society that fair for everyone, which is supportive of the welfare state concept, and generally influences policies that aim to provide equal access to opportunities for everyone.