Abstract Ernest R. Mowrer, a sociologist, joined the faculty of NU in 1928, where he remained until his retirement in 1963. During his career he developed a scientific method for role theory in studying the interaction of members of a family and deviant behavior.The Ernest R. Mowrer papers fill twelve boxes (one of which, a dropfront, contains maps and graphs drawn for use in his book, Disorganization: Personal and Social). The papers are arranged in six subseries:...