The papers document Felix S. Cohen's professional career as a civil servant, private attorney, law professor, and author. From 1933-1957, Cohen drafted legislation for the Department of Interior, most notably the Wheeler-Howard Indian Reorganization Act of 1934. In 1939 he headed the Indian Law Survey, which compiled all federal laws regarding Native Americans. He edited the summary of that survey, known as The Handbook of Federal Indian Law, which remains a milestone in the evolution of Indian law. Cohen continued to work for Indian and minority interests in private practice in the late 1940s and early 1950s.