This book is the first to collect the results of many years of research by Stephen Porges, a leading specialist in the field of psychophysiology and development and behavioral neuropology, who proposed an innovative theory. This theory puts forward and substantiates the assumption that the autonomic nervous system unconsciously mediates social activity, trust and intimacy. Stephen Porges tells how, based on polyvagal theory, it is possible to achieve tremendous success in the treatment of post-traumatic stress disorder, anxiety, depression, psychological trauma and autism.