Charles Eastman (1858-1939) was a Wahpeton (Santee) Sioux who attended
Dartmouth College and Boston University Medical School.  He was the first
Native American to hold a position of authority at the Pine Ridge Agency,
where he was a doctor.  While working at the reservation, he witnessed the
Ghost Dance movement, and he was one of the first people to visit Wounded
Knee after the massacre.  Active in the YMCA and one of the founders of
the Boy Scouts of America, Eastman's civic-mindedness (and his ability to
move comfortably in both white and Indian society) led him to co-found the
Society of American Indians in Columbus, Ohio, in 1911.