His most famous work, "On the Origin of Species" (1859), introduced the theory of evolution by natural selection and is widely regarded as one of the most influential books ever written. Other major works include "The Voyage of the Beagle" (1839), a vivid travel narrative documenting his scientific journey; "The Descent of Man" (1871), which applied evolutionary theory to humans and introduced the concept of sexual selection; "The Expression of the Emotions in Man and Animals" (1872), a pioneering study of psychology; and "The Structure and Distribution of Coral Reefs" (1842), which presented his innovative theory of reef formation.
Darwin's writings remain essential reading in both science and literature, securing his legacy as one of history's most influential authors.