The Expression of the Emotions in Man and Animals

Published in 1872, The Expression of the Emotions in Man and Animals was a book at the very heart of Darwin's research interests - a central pillar of his 'human' series. This book engaged some of the hardest questions in the evolution debate, and it showed the ever-cautious Darwin at his boldest. If Darwin had one goal with Expression , it was to demonstrate the power of his theories for explaining the origin of our most cherished human qualities: morality and intellect. As Darwin explained, " He who admits, on general grounds, that the structure and habits of all animals have been gradually evolved, will look at the whole subject of Expression in a new and interesting light.