Emotions and culture society. Therefore, it can be said that culture is a necessary framework for researchers to understand variations in emotions. In Darwin's opening chapter of "The Expression of the Emotions in Man and Animals", (1872/1998) Darwin considered the face to be the preeminent medium of emotional expression in humans, and capable of representing both major emotions and subtle variations within each one. Darwin's ideas about facial expressions and his reports of cultural differences became the foundation for ethological research strategies. Silvan Tomkins' (1962) "Affect Theory" 1963) built upon Darwin's research, arguing that facial expressions are biologically based, and universal manifestations of
The Expression of the Emotions in Man and Animals with engravings of the Darwin family's domestic pets by the zoological illustrator T. W. Wood as well as work by the artists Briton Rivière, Joseph Wolf and A.D. May. It also included portraits by the Swedish photographer Oscar Rejlander (1813–1875), anatomical diagrams by Sir Charles Bell (1774–1842) and Friedrich Henle (1809–1885), as well as illustrational quotations from the "Mécanisme de la physionomie humaine" (1862) by the French neurologist Duchenne de Boulogne (1806–1875). As a result of his domestic psychology experiments, Darwin reduced the number of commonly observed emotions from Duchenne's calculation of more than sixty facial expressions, to just six