Emotions are viewed as having evolved through their adaptive value in dealing with fundamental life-tasks. Each emotion has unique features: signal, physiology, and antecedent events. Each emotion also has characteristics in common with other emotions: rapid onset, short duration, unbidden occurrence, automatic appraisal, and coherence among responses. These shared and unique characteristics are the product of our evolution, and distinguish emotions from other affective phenomena.

Darwin discusses why different muscles are brought into action under different emotions and how particular animals have adapted for association with man.

Book synopsis: With the emergence of democracy in the city-state of Athens in the years around 460 BC, public speaking became an essential skill for politicians in the Assemblies and Councils - and even for ordinary citizens in the courts of law. In response, the technique of rhetoric rapidly developed, bringing virtuoso performances and a host of practical manuals for the layman. While many of these were little more than collections of debaters' tricks, the Art of Rhetoric held a far (...) deeper purpose. Here Aristotle establishes the methods of informal reasoning, provides the first aesthetic evaluation of prose style and offers detailed observations on character and the emotions. Hugely influential upon later Western culture, the Art of Rhetoric is a fascinating consideration of the force of persuasion and sophistry, and a compelling guide to the principles behind oratorical skill. (shrink)