The Society of American Indians (1911–1923) was the first national American Indian rights organization run by and for American Indians. The Society pioneered twentieth century Pan-Indianism, the movement promoting unity among American Indians regardless of tribal affiliation. The Society was a forum for a new generation of American Indian leaders known as Red Progressives, prominent professionals from the fields of medicine, nursing, law, government, education, anthropology and ministry. They shared the enthusiasm and faith of Progressive Era white reformers in the inevitability of progress through education and governmental action.

Pan-Indianism is a philosophical and political approach promoting unity, and to some extent cultural homogenization, among different Indigenous groups in the Americas regardless of tribal distinctions and cultural differences.