Charles Darwin was a British naturalist whose theory or evolution by natural selection became the basis of modern theories of evolution. Darwin shocked the Victorians by suggesting that humans and animals shared the same ancestry. The Origin of Species is his most famous work. Chapters include, The General Means of Expression, Expression in Animals, Special Expressions in Animals, Special Espressons in Man, Low Spirits, Anxiety, Grief, Dejection, despair, Joy, High Spirits, Love, Tender Feelings, Devotion, Reflection–Meditation–Ill–temper–sulkiness Determination, Hatred and Anger, -Disdain–Contempt–Disgust–Guilt–Pride, etc.–Helplessness–Patience–Affirmation and Negation, Surprise–Astonishment–Fear-Horror, Self-attention–Shame–Shyness–Modesty: Blushing, and Summary.