Cultural pluralism is a term used when smaller groups within a larger society maintain their unique cultural identities, and their values and practices are accepted by the wider culture provided they are consistent with the laws and values of the wider society. Cultural pluralism is often confused with Multiculturalism. Multiculturalism lacks the requirement of a dominant culture.
One example is the United States which has a relative strong dominant culture which includes strong elements of nationalism, a sporting culture and an artistic culture. In a pluralist culture, unique groups not only co-exist side by side, but also consider qualities of other groups as traits worth having in the dominant culture. A successful pluralistic society will place strong expectations of integration on its members rather than expectations of assimilation. A society that lacks a strong dominant culture can easily pass practicing cultural pluralism to multiculturalism without any intentional steps being taken by that society.
Social philosophy is the philosophical study of questions about social behavior (typically, of humans). Social philosophy addresses a wide range of subjects, from individual meanings to legitimacy of laws, from the social contract to criteria for revolution, from the functions of everyday actions to the effects of science on culture, from changes in human demographics to the collective order of a wasp's nest.