Offering up clinical studies and a complete reevaluation of classical psychiatry, Oughourlian explores the interaction among reason, emotions, and imitation and reveals that rivalry—the blind spot in contemporary neuroscientific understandings of imitation—is a misunderstood driving force behind mental illness. Oughourlian’s analyses shake the very foundations of psychiatry as we know it and open up new avenues for both theoretical research and clinical practice.