According to Carver and Scheier (2008), psychodynamic theory is a perspective in psychology that suggests that “personality is a dynamic set of processes, always in motion. Sometimes they work in harmony with each other and sometimes against each other, but they are never still (p. 158).” The implication most commonly associated with Psychodynamic Theory is that because these processes are always in action, forces struggle with each other, creating conflict within the self. Another implication of this theory is that the unconscious mind plays a major role in determining personality. Conflicts that occur between elements of the personality usually do so outside of consciousness. Psychodynamic theory is accentuated by various themes, seemingly inherent to the human experience, permeated by qualities of lust and aggression, sexuality and death. These themes are related to Darwin's theory of evolution. This relationship between theories leads to the notion that humans are animals and that our primary goal is reproduction (Carver and Scheier, 2008, p. 158). Many psychologists and psychiatrists throughout history have contributed to psychodynamic theory, but the founder of psychoanalysis, a subset of psychodynamic theory, was Sigmund Freud. Sigmund Freud is known as the father of psychodynamic theory. According to Freud the perspectives were highly metaphorical, as he theorized that human experiences are permeated with lust, aggression and sexuality. Freud hypothesized that human behavior was symbolic and different from the reality of a situation, and therefore placed emphasis on the process of behavior. Freud theorized that consciousness functions across three topographical regions of the mind. The first region is consciousness... the center of the card... the third defense mechanism is projection. Projection is defined in two ways; imposing one person's negative experience on another or projecting one's own insecurities onto another person. Rationalization is the fourth type of defense mechanism. It is achieved through justifying one's behavior in order to maintain one's self-esteem. Displacement/sublimination is the last type of defense mechanism. It is considered the least neurotic and most adaptive. Displacement changes goals, while sublimation justifies unacceptable behavior with another behavior or position. A person's perception of reality may differ from a specific situation due to the id, ego and superego which then influence their behavior. Sigmund Freud's psychodynamic theory suggests the belief that an individual's behavior and emotions as an adult are the foundation of childhood experiences.