Now that hygiene has made such striking advances in the treatment of nutritional and infectious disorders, there is a growing interest in the prevention or reduction of mental maladjustments and mental disorders. In this book, which consists of three lectures recently delivered at the Illinois College of Medicine, Dr. Campbell discusses the more serious types of mental disorders. He gives a concise presentation of a number of actual cases, an analysis of the individual and social problems involved, and a review of the resources of the individual and of the community for meeting the challenge of these cases. The issues discussed are of importance to the teacher, the social worker, the pastor, the parent, and to whoever is interested theoretically or practically in the difficulties of the individual in adapting himself to the social environment.