This symposium is organized around three major themes: early behavior, comparative studies, and the experimental method. It focuses on the activities of the Social Science Research Council’s Committee on ComparativeDevelopmental Behavior, one of several committees organized and promoted by the Council in the 1960’s. Specifically, the discussion revolves around issues covered in a pair of conferences organized by the Committee which resulted in the volume, Early Behavior: Comparative and Developmental Approaches, published in 1967 by Wiley. Members of the Committee included some of psychology’s best known researchers at the time: Harry Harlow, Robert Sears, Harriet Rheingold, and Eckhard Hess. I was Chairman of the Committee and Francis Palmer of the Council staff worked with us in organizing the Committee’s activities.