Culture is the basis of racial group boundary.As to the relationship among racial groups,theories are different:such as assimilation theory, pluralistic culture hypothesis, hum...

• 关于族群关系的讨论有许多不同的理论：同化理论、文化多元理论、生物学的理论、人文生态理论、权力和分层理论及整合的族群关系理论等。