The author has developed a theory of Living Human Systems and its systems-centered practice. This book presents a series of chapters that trace the development of the theory of Living Human Systems through the years of 1987 to 2002. As the theory develops, so do the methods and techniques that put it into practice. The last chapter summarizes the current application and the nuts and bolts of systems-centered therapy. It also describes in detail the connection between the hierarchy of defenses modifications and the specific phases of system development that determine readiness for change.The papers in this volume contribute to expanding our knowledge of the boundaries between clinical and social psychology with the investigation of living human systems and systems-centered group and individual therapy. The author's considerable body of work illustrates the highest blend of creativity and learning.