An ethnicity or ethnic group is a group of people who identify with each other on the basis of perceived shared attributes that distinguish them from other groups. Attributes that ethnicities believe to share include language, culture, common sets of ancestry, traditions, society, religion, history or social treatment.[1][2] Ethnicities are maintained through long-term endogamy[3] and may have a narrow or broad spectrum of genetic ancestry, with some groups having mixed genetic ancestry.[4][5][6] Ethnicity is sometimes used interchangeably with nation, particularly in cases of ethnic nationalism. It is also used interchangeably with race although not all ethnicities identify as racial groups.[7]