Indigenous Americans in the United States and how Social Democracy can support them.

I recently purchased the book "Bury My Heart at Wounded Knee" by Dee Brown, which details the atrocities and injustices committed against America's indigenous populations all throughout the 19th and 20th centuries. Reading through it has made me incredibly interested in the American Indian Movement, and how we, as leftists, can support indigenous populations as they face socioeconomic disparities and struggle to preserve their ancestral cultures.

Any thoughts?