The Expression of the Emotions in Man and Animals

Before Darwin, human emotional life had posed problems to the traditional philosophical categories of mind and body.^[1][2] Darwin's interest can be traced to his time as an Edinburgh medical student and the 1824 edition of Sir Charles Bell's Anatomy and Philosophy of Expression which argued for a spiritual dimension to the subject. In contrast, Darwin's biological approach links emotions to their origins in animal behaviour, and allows cultural factors only an auxiliary role in the shaping of expression. This biological emphasis leads to a concentration on six different emotional states: happiness, sadness, fear, anger, surprise and disgust. It also leads to an appreciation of the universal nature of expression, with its implication of a single origin for the entire human species; and Darwin points to the importance of emotional communication with children in their psychological development. Darwin sought out the opinions of some leading psychiatrists, notably James Crichton-Browne, in the preparation of the book which forms his main contribution to psychology.^[3]


Amongst the innovations with this book are Darwin's circulation of a questionnaire (probably inspired by his cousin, Francis Galton) during his preparatory research; simple psychology experiments ^[4] on the recognition of emotions with his friends and family; and (borrowing from Duchenne de Boulogne, a physician at the Salpêtrière) the use of photography in his presentation of scientific information. Publisher John Murray warned Darwin that including the photographs would "poke a hole in the profits" of the book and withheld the publication of some which are discussed in the text. Nevertheless, The Expression of the Emotions is an important landmark in the history of book illustration.

Structure[edit]

Darwin opens the book with three chapters on "the general principles of expression", introducing the rather Lamarckist phrase serviceable associated habits. With this phrase, Darwin seeks to describe the initially voluntary actions which come together to constitute the complex expressions of emotion. He then invokes a principle of antithesis, through which opposite states of mind induce directly opposing movements. Finally, he discusses a direct action of the nervous system, in which an overflow of emotion is widely discharged, producing more generalised emotional expression.


This is followed by a section (three more chapters) on modes of emotional expression peculiar to particular species, including man. He then moves on to the main argument with his characteristic approach of astonishingly widespread and detailed observations. Chapter 7 discusses "low spirits", including anxiety, grief, dejection and despair; and the contrasting Chapter 8 "high spirits" with joy, love, tender feelings and devotion. In his discussion of "low spirits", Darwin writes: "After the mind has suffered an acute paroxysm of grief, and the cause still continues, we fall into a state of low spirits, or we may be utterly cast down and dejected. Prolonged bodily pain, if not amounting to an agony, generally leads to the same state of mind. If we expect to suffer, we are anxious; if we have no hope of relief, we despair." High spirits, exemplified by joy, find their purest expression in laughter, an aspect of happy play in children.


Subsequent chapters include considerations of "reflection and meditation" (associated with "ill-temper", sulkiness and determination), Chapter 10 on hatred and anger, Chapter 11 on "disdain, contempt, disgust, guilt, pride, helplessness, patience and affirmation" and Chapter 12 on "surprise, astonishment, fear and horror". In his discussion of the emotion of disgust, Darwin notes its close links to the sense of smell, and conjectures an association with excretory products. In Chapter 13, Darwin discusses complex emotional states including self-attention, shame, shyness, modesty and blushing. Darwin describes blushing as "the most peculiar and most human of the expressions".


Darwin closes the book with Chapter 14 in which he recapitulates his main argument: he shows how human emotions link mental states with bodily movement, and are genetically determined, deriving from purposeful animal actions. He comments on the implications of the book: a single origin for the entire human species, with universal human expressions; and he stresses the social value of expression, citing the emotional communication between mother and child. This is thinking far ahead of its time, when not even the biochemical nature of heredity was known, to arrange complex phenotypes such as human ethology on genetic pillars.