The expression of the emotions in man and animals c. 1872

This book, "The Expression of the Emotions in Man and Animals," is a scientific work by Charles Darwin, published in 1872. It explores the evolution of emotional expressions in humans and animals, using a blend of observational data and Darwin's theory of natural selection. This book, considered a landmark in evolutionary biology and psychology, is an essential piece in understanding Darwin's influence on scientific thought. The book is a small, bound volume with a simple, unillustrated cover, showcasing the scientific nature of the work rather than aesthetic embellishment.