This is a book on evolutionary theory by the famous English naturalist, Charles Darwin. It succeeds his 1859 thesis 'On the Origin of Species', wherein he explores the idea of natural selection. In this text, he attempts to apply his evolutionary theory to human evolution, and presents his theory of sexual selection. A worthy addition to any bookshelf, this book will be of special appeal to admirers of Darwin and collectors of antiquarian literature. The chapters of this book include: 'The Evolution of the Descent of Man From Some Lower Form', 'Comparison of the Mental Powers of Man and the Lower Animals', 'Comparison of the Mental Powers of Man and the Lower Animals', etcetera. This book is being republished now in an affordable, modern edition - complete with a new biography of the author.