This book brings together a global community of mental health professionals to offer an impassioned defence of relationship-based depth psychotherapy. Expressing ideas that are integral to the mission of the Psychotherapy Action Network (PsiAN), the authors demonstrate a shared vision of a world where this therapy is accessible to all communities. They also articulate the difficulties created by the current mental health diagnostic system and differing conceptualizations of mental distress, the shortsightedness of evidence-based care and research, and the depreciation of depth therapy by many stakeholders. The authors thoughtfully elucidate the crucial importance of therapies of depth, insight, and relationship in the repertoire of mental health treatment and speak to the implications of PsiAN's mission both now and in the future. With a distinguished international group of authors and a clear focus on determining a future direction for psychotherapy, this book is essential reading for all psychotherapists.