This document discusses the concepts of ethnicity and race. It defines ethnicity as being based on cultural similarities and differences within a society, and ethnic groups as sharing certain beliefs, values, customs, and origins. Race is defined as an ethnic group assumed to have a biological basis. The document examines how ethnicity and race are socially constructed, and explores related concepts like status, nation, nationality, assimilation, plural societies, multiculturalism, and the roots of ethnic conflict.