This book presents a new integrative paradigm for psychotherapy that brings together cognitive behavioral, psychodynamic, and existential approaches within a coherent philosophical framework.Drawing from the history of philosophy it explores how metaphysical thought reflects both the intellectual spirit of the times and the psychosocial development of the individual. The model suggests that, just as ideas evolve through history, patients move through metaphysical stages-realism, idealism, and existentialism-throughout their therapeutic journey. By understanding and working within a patient's underlying metaphysical orientation, therapists can more thoughtfully align and integrate their interventions. While many experienced clinicians already draw flexibly from different traditions, this model gives structure and language to that intuitive integration. It encourages deeper reflection, clearer therapeutic direction, and a more deliberate engagement with each patient's worldview. It also opens a space for both therapist and patient to examine the assumptions that shape their ways of being and relating. Grounded in real-world clinical work yet informed by philosophical insight, this book offers a model that is accessible, nuanced, and practical.Rethinking Cognitive Behavioral, Psychodynamic, and Existential Therapy will appeal to therapists, students, and anyone interested in a more integrated and reflective approach to psychological treatment and human development.