Making of Expression of Emotions
The expression of emotions was something that interested Darwin long before he published on it. He spent almost forty years thinking, taking notes and inquiring about the expression of emotions, gathering observations and anecdotes from the most remote places on earth as well as from his own domestic surroundings.
Darwin wanted to show that most expressions are innate in humans and that shared expressions are evidence of common descent not just of all human races, but of humans and other animals.
As Paul Ekman writes in the introduction to his modern edition of The Expression of the Emotions in Man and Animals, the book is “a most fascinating example of Darwin’s attempts to obtain more systematic evidence on the question of universality”.