Psychodynamic theory is referred to in psychological literature more than any other. This is the stereotypical psychology - looking into your past, discovering hidden desires, rummaging through the unconscious. It is the most radical of the five theories, and by far the most criticised - accused of being sexist, seeing the human population as ill, and considering sex and hostility as the only motivation for human actions. However, this theory has proven to be one of the most influential forces in the twentieth century. Sigmund Freud believed that humans are driven from birth by two innate instincts Eros the life instinct - the self-preserving and erotic instinct and Thanatos the death instinct - the self destructive, aggression and cruelty instinct. These are controlled by a free floating sexual energy, the libido and is seen to be the single most important motivating force in adult life, driven from birth to enhance bodily pleasure. There is a lot more to the mind than meets the eye, much like an iceberg - only the very tip is showing. He is the one who came up with the concept of one's unconscious - the part of the mind where desires and memories are stored, unrecognised, only hinted at through dreams or slips of the tongue or the
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