Roscoe Turner Steffen (1893-1976), a Law School alumnus (1920), was on the faculty for over two decades. A member of the Legal Realist movement, Steffen was a leading agency law scholar, and taught the first-year agency course at Yale. Steffen published on a broad range of commercial law topics, and his innovative 1933 casebook, Cases on the Law of Agency, was one of the first to attempt to integrate modern problems of business organization into the agency materials.