I t has been the purpose of this book to report the long-term results of treatment of the borderline adolescent-a treatment based upon a developmental theory. We have shown, contrary to current assumptions, that many of these severely ill adolescents are actually amenable to the beneficial effects of this therapy. Given the proper therapeutic support, many can and will overcome their developmental arrest. More than half of our patients were able to return to the mainstream of life as functioning, coping individuals. In other words, therapy had affected the emergence and consolida­ tion of their real and healthy self.