The development of young people has confirmed what Christa Meves has been saying for 40 years: If the growing life does not receive the right shaping from both the mother and the father, abnormalities arise. This book scientifically substantiates these fundamental insights. On one hand, animal behavior research shows analogous results, while on the other hand, modern brain research confirms that the growth and development of the brain are significantly influenced not only by genetic predisposition, protein intake, and later challenges, but also by affection, indeed love, from consistent caregivers. The core of the book consists of the four basic drives of humans: the drive for nourishment, the drive for attachment, the drive for self-assertion, and the sexual drive. It outlines the prerequisites for normal and healthy drive development and addresses disturbances.