This document discusses concepts related to race and ethnicity. It defines key terms like race, ethnicity, and minority groups. It notes that race is a social construct while ethnicity relates to shared cultural traits. Minority groups are those that a society subordinates based on real or perceived physical/cultural differences. Prejudice involves rigid generalizations about groups, and discrimination is acting on prejudice by treating groups unequally. Theories of prejudice include scapegoating disadvantaged groups, an authoritarian personality, and cultural transmission of biases. Patterns of interaction between racial/ethnic groups include pluralism, assimilation, segregation, and genocide. The document then provides an overview of the racial and ethnic composition of the United States, describing the histories