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 those defending immutability of species, and in effect said that the book offered the best explanation "ever published of the manner of formation of species", though he did not agree with it in all respects. He still had the gravest doubts that transmutation would bestialise man. It appears that Darwin had assured Owen that he was looking at everything as resulting from designed laws, which Owen interpreted as showing a shared belief in "Creative Power". Darwin had already made his views clearer to others, telling Lyell that if each step in evolution was providentially planned, the whole procedure would be