Charles Eastman (1858–1939) straddled two worlds in his life and writing. The author of Indian Boyhood was raised in the traditional Dakota (Sioux) way after the upheaval of the 1862 U.S.–Dakota War. His father later persuaded Ohiyesa to take a white name, study Christianity, and attend medical school. But when Eastman served as a government doctor during the Wounded Knee massacre, he became disillusioned about Americans' capacity to live up to...