This book is written for students and specialists in the field of family psychotherapy to improve their professional skills. Specialists in this field will be able to further understand the principles of the functioning of the institution of the family as one of the fundamental elements of society. The book will also be useful for any psychotherapist who in his professional activity is faced with various aspects of family relations. The book explains the basic principles of the creation and functioning of the family at all levels throughout the history of mankind, starting from primitive times, when the concepts of the family were only laid in the human mind. The use of autonomy and adaptation science as the basis of all family therapy approaches is examined in detail and accessible, and the ways in which clinicians can use this science to expand practical skills and abilities are explained.