Monoculturalism is the policy or process of supporting, advocating, or allowing the expression of the culture of a single social or ethnic group. It generally stems from beliefs within the dominant group that their cultural practices are superior to those of minority groups and is similar to the concept of ethnocentrism which involves judging another culture, based on the values and standards of one's own culture. It may also involve the process of assimilation whereby other ethnic groups are expected to adopt the culture and practices of the dominant ethnic group. Monoculturalism, in the context of cultural diversity, is the opposite of multiculturalism.
Rather than the suppression of different ethnic groups within a given society, sometimes monoculturalism manifests as the active preservation of a country's national culture via the exclusion of external influences. Japan, South Korea, and North Korea are examples of this form of monoculturalism. However it may also be the result of less intentional factors such as geographic isolation, historical racial homogeneity, or political isolation. For instance, some European countries such as Italy, Portugal, Poland and the Northern European countries are still effectively monocultural because of the shared ethnicity and culture of the people, along with low immigration rates.[dubious ]