Individual psychology
Alfred Adler borrowed heavily from Nietzsche's work to develop his second Viennese school of psychotherapy called individual psychology. Adler (1912) wrote in his important book Über den nervösen Charakter (The Neurotic Constitution):Adler's adaptation of the will to power was and still is in contrast to Sigmund Freud's pleasure principle or the "will to pleasure", and to Viktor Frankl's logotherapy or the "will to meaning". Adler's intent was to build a movement that would rival, even supplant, others in psychology by arguing for the holistic integrity of psychological well-being with that of social equality. His interpretation of Nietzsche's will to power was concerned with the individual patient's overcoming of the superiority-inferiority dynamic.
In Man's Search for Meaning, Frankl compared his third Viennese school of psychotherapy with Adler's psychoanalytic interpretation of the will to power: