The importance of emotions in everyday life is the subject of this systematic study which presents students with a broad summary of 30 years of research and theory on emotion. The Psychology and Biology of Emotion rejects the view that the study of emotion is merely a branch of other fields. While it is ultimately related to clinical psychology, social psychology, ethology, psychiatry and psychoanalysis, it truly has an identity of its own. This book explores its constant features as well as its transient aspects, covering both contemporary and historical theories. The author is a well-known researcher in the field of emotion.