The Expression of the Emotions in Man and Animals

The Expression of the Emotions in Man and Animals is a book by the British naturalist Charles Darwin published in 1872, on how animals and humans express and signal to others their emotions. It, along with his 1871 book The Descent of Man and Selection in Relation to Sex, was part of Darwin's attempt to address questions of human origins and human psychology using his theory of evolution by natural selection.

See also