The Expression of the Emotions in Man and Animals is a book by the British naturalist Charles Darwin published in 1872, on how humans and non-human animals express their emotions. It was, along with his 1871 book The Descent of Man and Selection in Relation to Sex, part of Darwin's attempt to address questions of human origins and human psychology using his theory of evolution by natural selection.
When writing The Variation of Animals and Plants...
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The Expression of the Emotions in Man and Animals is a book by the British naturalist Charles Darwin published in 1872, on how humans and non-human animals express their emotions. It was, along with his 1871 book The Descent of Man and Selection in Relation to Sex, part of Darwin's attempt to address questions of human origins and human psychology using his theory of evolution by natural selection.
When writing The Variation of Animals and Plants under Domestication in 1866, Darwin intended to include a chapter including man in his theory, but the book became too big and he decided to write a separate "short essay" on ape ancestry, sexual selection and human expression which became two large volumes in The Descent of Man. After completing work on the proofs of The Descent of Man in January 1871, Darwin started on another book, using left over material on emotional expressions.
Darwin noted the universal nature of facial expressions in the book: "...the young and the old of widely...
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