Ivan Fuchs is a clinical psychiatrist. He immigrated to Israel at the age of 25 from a Hungarian ethnic region in Romania, learning Hebrew and English at a relatively advanced age. After his residency in psychiatry, he served for 30 years as head of chronic psychiatric wards at the Jerusalem Mental Health Center, affiliated with The Hebrew University—Hadassah School of Medicine, Jerusalem. This job allowed him to develop close and longstanding acquaintance with mental patients, which led to continuous contemplation and research on the nature and evolutionary origins of mental disorders. This intellectual journey gave birth to the present book during the first 5 years after his retirement. Dr. Fuchs lives in Jerusalem with his wife and has three children.