By the end of the nineteenth century, Protestant leaders and the Bureau of Indian Affairs had formed a long-standing partnership in the effort to assimilate Indians into American society. But beginning in the 1920s, John Collier emerged as part of a rising group of activists who celebrated Indian cultures and challenged assimilation policies. As commissioner of Indian affairs for twelve years, he pushed legislation to preserve tribal sovereignty, creating a crisis for Protestant reformers and their sense of custodial authority over Indians.
Although historians have viewed...