Psychology is today and has always been a hotly debated science. Since psychology separated from philosophy and the biological sciences, there have been controversies. The most debated topic was the explanation and description of human behavior and the human mind. It was the schools of thought in psychology that allowed the great names in psychology that we study and read on a daily basis to expose opinions and theoretical differences for all to study and perhaps formulate their own studies. and/or similar opinions. There are important names in the history of psychology such as; Sigmund Freud, Alfred Adler, Carl Jung and William James. Each of the psychologists mentioned proposed their own reasoning behind the psychological functions and causes of human behavior. Every doctor of psychology has their own perspective on why a person behaves a certain way. Take for example Sigmund Freud, who believed that the unconscious mind had a strong influence on human behavior. (Cherry, 2011). “According to Freud, the unconscious continues to influence our behavior and experience, even if we are unaware of these underlying influences.” (para. 8). Then there is William James, he was responsible for the influence of the school of thought regarding functionalism. James believed that a person's environment had a strong influence on his behavior. Carl Jung, another theorist of the psychoanalytic school of thought, believed that dream analysis plays an important role in influencing an individual's behavior. According to the text, Jung believed that the collective unconscious was a reservoir of all the experience and knowledge of the human species (Cherry, 2011). Psychologist Al...... middle of paper ......ind. The New York Times Company. Retrieved August 6, 2011, from http://psychology.about.com/od/theoriesofpersonality/a/coscienteuncon.htmCherry, K. (2011). Biography of William James (1842-1910). The New York Times Company. Retrieved August 8, 2011, from http://psychology.about.com/od/profilesofmajorthinkers/p/jamesbio.htmFragar, R. (2005). Transpersonal Pioneers: William James. Pearson Prentice Hall. August 8, 2011 from http://www.itp.edu/about/william_james.phpSoylent Communications. (2011). Alfred Adler. Retrieved August 7, 2011, from http://www.nndb.com/people/256/000097962/Soylent Communications. (2011). Carlo Jung. Retrieved August 5, 2011, from http://www.nndb.com/people/910/000031817/Taylor, E. (1996). Classics in the history of psychology. University of York. Retrieved August 8, 2011, from http://psychclassics.yorku.ca/James/TaylorWoz.htm