Sigmund Freud, Alfred Adler, CJ Jung, and William James were all brilliant and diverse theorists who made great contributions to the science of psychological studies. These brilliant minds fueled the psychological studies of future theorists with their contrasting theoretical approaches and findings. They sometimes collaborated to formulate concepts and understandings but separated due to conceptual disputes. Freud's theory of psychoanalysis was the epicenter of some studies, but these men in their individuality contributed their own theoretical concepts and developed their own schools of thought from Jung's analytical psychology, Adler's independent school of psychotherapy, emotions of James and Freud's psychoanalytic theory. The study of the mind is ongoing as society evolves and adapts, creating new mental processes to analyze and understand. Their contributions to the psychological school of thought continue to be embraced by many modern psychologists. Sigmund Freud was an Austrian neurologist who developed the discipline of psychoanalysis, theories of the unconscious mind, repression, and verbal psychotherapy, a method of treating psychopathology through verbal dialogue between patient and psychoanalyst. The principles of psychoanalytic therapy are human behavior; experience and cognition are determined by innate, irrational drives that are primarily unconscious. He believed that bringing those irrational drives into awareness is met with psychological resistance in the form of a defense mechanism. An individual's development is determined by events that occurred during childhood and by any conflict between the conscious and unconscious. He believed that nothing an individual does was due to chance and that every... medium of paper... was a science. The edge of the twenty-first century will bring new psychologists, new theories, and more, but psychologists like Freud, Jung, Adler, and James will never be forgotten for leading the way! ReferencesCarl Jung. (n.d.). In the New World Encyclopedia. Retrieved from http://newworldencyclopedia.org Goodman, R. (2009). Stanford Encyclopedia of Philosophy. Retrieved from http://plato.stanford.edu/entries/james/#3Goodwin, C.J. (2008). A history of modern psychology (3rd ed.). Hoboken, NJ: Wiley.Institute for Transpersonal Psychology. (2011). Retrieved from http://www.itp.edu/about/william_james.phpLensenn, P. (2004). Pragmatism by William James. Retrieved from http://www.authorama.com/pragmatism-9.htmlStipkovich, A. (2011). Freud, Jung, Adler and James, Theoretical positions. Retrieved from http://www.andmagazine.com/content/and_4603.php