In his classic work Man’s Search for Meaning, Viktor Frankl examines the experience of a concentration camp inmate through the lens of his own experiences in Auschwitz and other concentration camps during World War II. Frankl, who was already an expert on depression and suicide before the war, lost both of his parents and his wife to the hardships of concentration camps. After this immense suffering, Frankl resumed his work in psychiatry and earned a Ph.D. in Philosophy. He went on to develop Logotherapy, known as the third Viennese school of psychiatry, an existentialist version of psychotherapy based on the theory that the human drive to make sense of the world can create meaning from suffering. Frankl became a professor of Neurology and Psychiatry at the University of Vienna in 1955 and published 39 books before his death in 1997.