The Expression of the Emotions in Man and Animals public by arguing that humans had "animal traits", and instead charmed them by telling stories of "human traits in animals", thus avoiding too much explicit talk of natural selection at work. Darwin preferred to leave the evolutionary implications hanging. Korn points out that the book has never been out of print since 1872, calling into question Ekman's talk of "Darwin's lost masterpiece". The "Editor's notes" at the "Mead Project source page" on the book comment that Darwin concluded work on the book with a sense of relief. The proofs, tackled by his daughter Henrietta ("Ettie") and son Leo, required a
Sociology of emotions actions that feed-back negatively on this self-destructive situation. The social management of emotions might be the fundamental dynamics of social cooperation and conflict around resources, complexity, conflict and moral life. It is well-established sociological fact that expression and feeling of the emotion of anger, for example, is strongly discouraged (repressed) in girls and women in many cultures, while fear is discouraged in boys and men. Some cultures and sub-cultures encourage or discourage happiness, sadness, jealousy, excitedness, and many other emotions. The free expression of the emotion of disgust is considered socially unacceptable in many countries. Sociologist Randall Collins has stated