A bird's eye view of psychology today shows three major fields, each headed up by three major psychologists. They are Sigmund Freud's Depth Psychology, with its id, ego and superego; B. F. Skinner and Behaviorism, teaching that humans are conditioned by their experiences like the rats Skinner experimented on; and Carl Rogers of the Third Wave Psychologists, who believe in the basic goodness in the human heart and the importance in finding yourself by looking within.