In A Theory of Justice, John Rawls assumes that the principles of justice are for individuals in a society, and in general he assumes that the society is an ethnically homogeneous state. He thus follows the tradition associated with the dominant form of the social contract theory, which focuses on the individual and the state. His assumptions neglect the fact that almost all states are ethnically plural or heterogeneous, and that many of them confer special status and rights on ethnic groups as collective entities; for example, many of them confer special status and rights on indigenous groups, on groups disadvantaged by prior discrimination, and on minorities and other groups conceded a right to survive as distinct cultural entities. Status and rights for groups necessarily mean differentiation among individuals depending on their membership; and this in turn means that a theory of justice that focuses on the individual and neglects the group both fails to account for existing practices and fails to give guidance where the practices are at issue.