The book presents a comprehensive physiological theory of the emotions, breaking away from traditional intellectualist doctrines that treated feelings as mere derivative modes of knowledge. Ribot argues that emotional life is fundamentally rooted in biological conditions, needs, and instincts, which manifest as primary motor impulses and physiological reactions. Pleasure and pain are not fundamental entities, but rather vital symptoms indicating either an increase or a decrease of vital energy within the organism. The author constructs a clear evolutionary framework, dividing emotions into simple innate reactions such as fear, anger, and affection, and complex secondary sentiments that develop alongside general ideas.
He examines physical and moral pain, detailing their anatomical pathways and systemic organic consequences. A dedicated pathological method is employed to analyze morbid pleasures and pains, utilizing clinical anomalies like melancholia and analgesia to clarify normal mental states. Furthermore, the volume investigates the intimate connection between emotion and the chemical environment of the body, analyzing how internal sensations and organic toxins alter temperament. The study also covers the external physical expression of emotions through muscular innervation and vascular changes, providing a thorough physiological interpretation of mimicry. Finally, Ribot explores the revivability of emotional memories and the inevitable decay of affective life, concluding that feelings precede intelligence in the psychological hierarchy of human existence.
