title: Darwin's contributions to our understanding of emotional expressions.
abstract: Darwin charted the field of emotional expressions with five major contributions. Possible explanations of why he was able to make such important and lasting contributions are proposed. A few of the important questions that he did not consider are described. Two of those questions have been answered at least in part; one remains a major gap in our understanding of emotion.
authors.affiliation: University of California, San Francisco, CA, USA. paul.ekman@yahoo.com
authors.forename: Paul
authors.initials: P
authors.lastname: Ekman
mesh_terms: D000818:Animals; D005075:Biological Evolution; D004644:Emotions / Q000502:physiology*; D005149:Facial Expression; D049672:History, 19th Century; D006801:Humans