The Expression of the Emotions in Man and Animals The Expression of the Emotions in Man and Animals The Expression of the Emotions in Man and Animals is Charles Darwin's third major work of evolutionary theory, following "On the Origin of Species" (1859) and "The Descent of Man" (1871). Originally intended as a section of "The Descent of Man", it was published separately in 1872 and concerns the biological aspects of emotional life. In this book, Darwin sets out some early ideas about behavioural genetics, and explores the animal origins of such human characteristics as the lifting of the eyebrows in moments of surprise and the mental confusion which
Body language postural expressions of emotions such as anger/aggression, happiness, and fear. These similarities support the evolution argument that social animals (including humans) have a natural ability to relay emotional signals with one another, a notion shared by several academics (Chevalier-Skolnikoff, 1974; Linnankoski, Laakso, Aulanko, & Leinonen, 1994). Where Darwin notes similarity in expression among animals and humans, the Cultural Equivalence Model notes similarity in expression across cultures in humans, even though they may be completely different. One of the strongest pieces of evidence that supports this model was a study conducted by Ekman and Friesen (1971), where members of a preliterate