The book begins with countless illustrations, which Darwin sketched while traveling around the world. These illustrations are periodically referenced in the piece as evidence to support his theory. After the sketches, the book is divided into chapters with different intentions. The first chapters provide brief examples and a history of the theory of evolution. His theory is not directly stated until chapter four. After this chapter, the rest of the book is made up of subsequent chapters that provide examples to prove his theory, but, more importantly, outlines all the possible flaws in his theory and concisely proves their inaccuracy. In the first chapter, "Variation under Domestication", Darwin begins to set the framework for his later theory. The main topic of this chapter is the ability of humans to create variation in a species for a desired trait, such as the sweetness of a fruit or the beauty of a pigeon. Everyone at that time knew that it was possible to cherry-pick to achieve desired changes, but what Darwin demonstrated was that if humans are able to change a species even slightly in such a short period of time, the chances that nature achieve this result in millions of years are infinite. not only plausible, but inevitable. One of his other major realizations came while studying pigeons; Darwin, with the help of other naturalists, was able to deduce that all the different breeds of pigeon could trace their ancestry to the common rock pigeon, at least within the borders of the United Kingdom. What this helped Darwin notice was that if all the different species on Earth were created and had never gone through the process of evolution, what was the purpose of so many different types of one bird? Only the pigeon had eight... middle of the paper... glas J. 1986. Evolutionary Biology, Sinauer Associates, inc. Sunderland, Mass. Glass, B., O. Temkin, & W. L. Strauss (Eds.). 1959. Darwin's Precursors: 1745-1859. Johns Hopkins Press, Baltimore.Bowler, Peter J. 1989. Evolution: The Story of an Idea. University of California Press, Berkeley. Dawkins, R. (2008, August). The Genius of Charles Darwin - Full Length HD (All 3 Episodes) [Video File]. Retrieved from http://www.youtube.com/watch?v=A0VnuhHq5m0Leff, D. (2000, February 12). AboutDarwin.com - Beagle Travel. Retrieved from http://www.aboutdarwin.com/voyage/voyage02.htmlMerril, L.L. (1991). Charles Darwin; and The Ruling Passion by John Gould | History today. Retrieved from http://www.historytoday.com/lynn-l-merrill/charles-darwin-ruling-passion-john-gouldWood, John C. (ed.) 1986. Thomas Robert Malthus: Critical Assesments. Vol II. Croom Helm, London.