Genetics and the Origin of Species natural selection, and speciation throughout his book to explain habits of populations and the resulting effects on their genetic behavior. The book explains evolution in depth as a process over time that accounts for the diversity of all life on Earth. The study of evolution was present, but greatly neglected at the time. Dobzhansky illustrates that evolution regarding the origin and nature of species during this time in history was deemed mysterious, but had expanding potential for progress to be made in its field. In Darwin's theory of natural selection, more organisms are produced than can survive. Some have variations
Reactions to On the Origin of Species & Natural (as far as Final Causes & Design are concerned) on the other. The range & mass of knowledge take away one's breath." To Fanny Wedgwood she wrote, "I rather regret that C.D. went out of his way two or three times to speak of "The Creator" in the popular sense of the First Cause... His subject is the 'Origin of Species' & not the origin of Organisation; & it seems a needless mischief to have opened the latter speculation at all – There now! I have delivered my mind." The Revd. Adam Sedgwick had received his copy "with