This introduction presents an overview of the key concepts discussed in the subsequent chapters of this book. The book provides a detailed insight into his creation of a new field of scientific research: the concept of affect regulation and its relationship to emotional development, first introduced by Allan Schore. His research integrates findings that draw from various scientific disciplines, such as attachment theory, affective neuroscience, developmental psychology, and psychodynamic psychotherapy. In addition to the significance of affect regulation theory for the developmental and clinical disciplines, the work has important implications both within and beyond the field of mental health. The book offers the reader an entry and overviews as well as a deeper look into Schore’s critical research, as well as the mind that created it. It also offers some interviews with Schore, in order to give not only a more informal presention of his theories, but also a more personal glimpse into his motivations and his creativity.