Darwin: From the Origin of Species to the Origin of Man I. The Origin of Darwin's Theory 1.1 Historical Questions 1.2 Early Reflections on Darwin 2. Darwinian Evolution 2.1.The Concept of Natural Selection2.2.The Central Thesis of Origin III. Reception of Origin 3.1 General Acceptance of Darwin's Theory3.2 Professional Acceptance of Darwin's Theory4. Human Evolution and the Decline of Mankind 4.1 Origins of Darwin's Descendants 4.2. Reception of Decline 4.3 Ethics of Human Origins V. Summary and Conclusions