Psychiatry is a branch of medicine that still remains mysterious and not fully studied. The question of what causes mental disorders is still open. Dr. Christopher Palmer, Harvard Medical School professor, presents a unique theory of the origin of all mental illnesses. He argues that they all share a common development mechanism linked to brain metabolism. In his book, he describes the factors that influence this process and offers ways to prevent mental problems. The book also explains why modern treatment methods help only for a short time, how physical processes in the brain are connected to mental symptoms, why different people show different symptoms of the same disorder, and how to recognize signs of mental illness and what measures to take.