A rich introduction to Murray Bowen's natural systems theory. Explains relevance of the theory to clinical work with families, couples, and individuals. Also, briefly explores and contrasts the relationship of Bowen theory to sociobiology, evolutionary neurology, and analytic theory. Case illustrations are clear and helpful. Would recommend to social workers, psychologist, biologists, and those interested in a natural systems approach to human behavior. Although strong on evaluation and descriptions concerning emotional processes in human families and groups, there is less attention to therapy techiques. More of a book about thinking on relationships, than one of the clinical "how to" kind of presentations that have become standard fare in the family therapy field. I have read through Dr. Kerr's text several times and have studied its chapters separately. Each reread reveals additional applications and insights into the theory. Surely, a book that can grow with you! Dr. Bowen's epilogue is an added jem in which he offers perhaps his last written description of the development of the theory and his belief in the relevance of theory to the future. Personally, the book has influenced both my private and professional life.