Published on the anniversary of Darwin's 200th birthday, these prime excerpts from the great naturalist's landmark work build on the evolutionary concepts introduced in On the Origin of Species. The earlier work provided a basic exposition of Darwinian theory. The Descent of Man, published a dozen years later, asserts that humans are the descendants of apes, which were descended from even more primitive creatures. This fascinating treatise on evolutionary psychology explores the two defining forces of human and animal evolution—natural selection and sexual selection. Numerous examples from Darwin's years of study illustrate its compelling conclusion: However much we differ from other animals, we are descended from common ancestors and have evolved in similar ways. Based upon the original edition, this abridgement by a noted Darwinian scholar offers a highly readable version of one of the most important books in the history of science.