The human mind and how it behaves has been a major subject of study among historians for many years. Studies have been conducted in various professional fields to gain knowledge and understanding of human beings in an attempt to control their behavior. The study of human behavior is known as behavioral psychology or behaviorism. The goal of the early behaviorists and functionalists was to achieve a more reliable psychology. Behaviorists believed they achieved this by excluding introspection and focusing on the study of behaviorism. This evolution was achieved with the help of the zeitgeist, behaviorism and organizational psychology. This article will discuss J.R. Angell and his prediction of the shift in psychology from introspection to behaviorism, the people and ideas who helped bring about the change, how the zeitgeist supported the change, and how the development of industrial psychology has played its role in the change. .What did Angell base his opinion on? JR Angell was a psychologist and educator, who studied with John Dewey and William James. Angell worked as a psychology teacher at the University of Minnesota. It was at this university that Angell established a psychology department in 1905 (Schultz and Schultz, 2012, p.294). Schultz and Schultz (2008) wrote:JR Angell of the University of Chicago, perhaps the most progressive of functional psychologists, predicted that American psychology was ready for greater objectivity. In 1910 he commented that it seemed possible that the term consciousness would disappear from psychology, just as the term soul had disappeared. (p. 293) Behaviorism, which fought to end uncompromising structuralism, was underway when Angell made his statement in 2008. JR Angell is on…half the paper…or individuals. Conclusion Psychology has grown since the foundation of behaviorism. Many individuals and ideas played an important role in creating the atmosphere for behaviorism to be widely accepted. The Zeitgeist of that period had also contributed to the acceptance of behaviorism. Therefore, when Watson entered the scene, it was not difficult for his ideas to be accepted. Organizational psychology has also played its role by demonstrating that it is possible to apply techniques in every aspect to bring about change. Works cited Buckley, K. W. (1989). Mechanical Man: John Broadus Watson and the Beginnings of Behaviorism. New York: The Guilford press Goss, A. E. (1961). Early behaviorism and verbal mediation responses. American Psychologist,16(6), 285-298.Schultz, D.P. & Schultz, S.E. (2012). A History of Modern Psychology, (10th edition) Belmont, CA: Wadsworth, Cengage Learning