An ethnic group's a group of human beings whose members identify with each other, through a common heritage that's real or presumed. Ethnic identity's further marked by the recognition from others of a group's distinctiveness and the recognition of common cultural, linguistic, religious, behavioural or biological traits, real or presumed, as indicators of contrast to other groups. Ethnicity's an important means through which people can identify themselves. According to "Challenges of Measuring… (More on Ethnic)