Affirming also that all peoples contribute to the diversity and richness of civilizations and cultures, which constitute the common heritage of humankind; Affirming further that all doctrines, policies and practices based on or advocating superiority of peoples or individuals on the basis of national origin or racial, religious, ethnic or cultural differences are racist, scientifically false, legally invalid, morally condemnable and socially unjust; Reaffirming that indigenous peoples, in the exercise of their rights, should be free from discrimination of any kind.