Viktor Emil Frankl (26 March 1905 – 2 September 1997) was an Austrian neurologist and psychiatrist as well as a Holocaust survivor. He survived Theresienstadt, Auschwitz, Kaufering and Türkheim. Frankl was the founder of logotherapy, which is a form of existential analysis, the "Third Viennese School of Psychotherapy". His best-selling book Man's Search for Meaning (published under a different title in 1959: From Death-Camp to Existentialism, and originally published in 1946 as Trotzdem Ja Zum Leben Sagen: Ein Psychologe erlebt das Konzentrationslager, meaning Nevertheless, Say "Yes" to Life: A Psychologist Experiences the Concentration Camp) chronicles his experiences as a concentration camp inmate, which led him to discover the importance of finding meaning in all forms of existence, even the most brutal ones, and thus, a reason to continue living. Man's Search for Meaning has sold over 12 million copies and has been translated into 24 different languages. Frankl became one of the key figures in existential therapy and a prominent source of inspiration for humanistic psychologists.Frankl has been the subject of criticism from several holocaust analysts who questioned the levels of Nazi accommodation inherent in the ideology of logotherapy and acts Frankl personally willingly pursued in the time periods before Frankl's internment, when Frankl voluntarily requested to perform unskilled lobotomy experiments approved by the Nazis on Jews, to the time period of his internment, in what is hinted upon in Frankl's own autobiographical account and later under the investigative light of biographical research.