The document summarizes the psychodynamic approach developed by Sigmund Freud. It describes the key assumptions that human behavior can be explained by inner conflicts in the mind. The mind is comprised of the conscious and unconscious. Freud proposed that the mind has three parts - the id, ego, and superego. The id operates on pleasure, the superego acts as the conscience based on morality, and the ego mediates between the two. Freud also described psychosexual development stages from oral to genital that center around different erogenous zones as children develop.