and the United States, though in some parts of the world, notably Latin America, its influence in the later 20th century expanded substantially. Psychoanalysis also remains influential within many contemporary schools of psychotherapy and has led to innovative therapeutic work in schools and with families and groups. There is a substantial body of research which demonstrates the efficacy of the clinical methods of psychoanalysis and of related psychodynamic therapies in treating a wide range of psychological disorders. The neo-Freudians, a group including Alfred Adler, Otto Rank, Karen Horney, Harry Stack Sullivan and Erich Fromm, rejected Freud's theory of instinctual drive, emphasized interpersonal relations and self-assertiveness, and made modifications to therapeutic practice that reflected these theoretical shifts. Adler originated the approach, although his influence was indirect due to his inability to systematically formulate his ideas. The neo-Freudian analysis places more emphasis on the patient's relationship with the analyst and less on the exploration of the unconscious. Carl Jung believed that the collective unconscious, which reflects the cosmic order and the history of the human species, is the most important part of the mind. It contains archetypes, which are manifested in symbols that appear in dreams, disturbed states of mind, and various products of culture. Jungians are less interested in infantile development and psychological conflict between wishes and the forces that frustrate them than in integration between different parts of the person. The object of Jungian therapy was to mend such splits. Jung focused in particular on problems of middle and later life. His objective was to allow people to experience the split-off aspects of themselves, such as the anima (a man's suppressed female self), the animus (a woman's suppressed male self), or the shadow (an inferior self-image), and thereby attain wisdom. Jacques Lacan approached psychoanalysis through linguistics and literature. Lacan believed that most of Freud's essential work had been done before 1905 and concerned the interpretation of dreams, neurotic symptoms, and slips, which had been based on a revolutionary way of understanding language and its relation to experience and subjectivity, and that ego psychology and object relations theory were based upon misreadings of Freud's work. For Lacan, the determinative dimension of human experience is neither the self (as in ego psychology) nor relations with others (as in object relations theory), but language. Lacan saw desire as more important than need and considered it necessarily ungratifiable. Wilhelm Reich developed ideas that Freud