John Rawls' theory of justice proposes two principles of justice: 1) Each person has equal basic rights and liberties, and 2) Social and economic inequalities are acceptable only if they benefit society's least advantaged members. Rawls argues these principles would be chosen by individuals in an "original position" behind a "veil of ignorance" where they do not know their abilities or social status. While some aspects like equal opportunity are practical, critics argue Rawls' conception of the original position is unrealistic. Overall, Rawls' theory provides an important framework for thinking about justice, though some elements may not be directly applicable in reality.