Logotherapy
Logotherapy was developed by neurologist and psychiatrist Viktor Frankl. It is considered the "Third Viennese School of Psychotherapy" after Freud's psychoanalysis and Adler's individual psychology. Logotherapy is based on an Existential Analysis focusing on Kierkegaard's will to meaning as opposed to Adler's Nietzschean doctrine of will to power or Freud's will to pleasure. Rather than power or pleasure, logotherapy is founded upon the belief that it is the striving to find a meaning in one's life that is the primary, most powerful motivating and driving force in humans. A short introduction to this system is given in Frankl's most famous book, Man's Search for Meaning, in which he outlines how his theories helped him to survive his Holocaust experience and how that experience further developed and reinforced his theories.
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