<p>The Origin of Species introduced the scientific theory that populations evolve over the course of generations through a process of natural selection. It presented a body of evidence that the diversity of life arose by common descent through a branching pattern of evolution. <br>Contents: <br>Variation Under Domestication <br>Variation Under Nature <br>Struggle for Existence <br>Natural Selection <br>Laws of Variation <br>Difficulties on Theo...