Darwin's work of 1872 still provides the point of departure for research in the theory of emotion and expression. Although he lacked the modern research tool of cybernetics, his basic methods have not been improved upon. Lay readers, too, will be struck by the freshness and directness of this book, ...

Darwin's work of 1872 still provides the point of departure for research in the theory of emotion and expression. Although he lacked the modern research tool of cybernetics, his basic methods have not been improved upon. Lay readers, too, will be struck by the freshness and directness of this book, which includes, among other data, Darwin's delightfully objective analysis of his own baby's smiles and pouts.