This book seeks to bring together and understand the determining factors involved in reactive attachment disorders in children and, by extension, in adults. Following a review of the historical and theoretical framework, this work examines a wide range of aspects of the issue, such as the social representations associated with the field of pathology, the impact of personal beliefs on psychological life, and recent developments in the neurosciences and their potential contribution to these problems. Based on clinical cases encountered in practice, this book aims to provide the reader with a comprehensive overview of reactive attachment disorders, as well as a basis for understanding the related psychological phenomena and their nosographic, clinical and relational implications.