The study of animal behavior in the United States expanded considerably between the two World Wars, in terms of the number of biologists interested in the subject and the scope of dieir research (Burkhardt, 2005; Dewsbury, 1989b; Mitman & Burkhardt, 1991). These biologists came from both naturalist and experimentalist traditions. For example, Warder Clyde Allee, at the University of Chicago, incorporated animal behavior into an ecological context. Allee stressed the importance of an organism's interactions with the community in which it lived and the surrounding environmental conditions in producing its behavior (Mitman, 1992). Taking a very different approach, William C. Young, one …