In Darwin’s last chapter “Recapitulation and Conclusion”, he poses several arguments to convince his readers of the role of evolution through natural selection. He talks about how you can observe the variety produced by selective breeding, and that there isn’t any reason that change and variety doesn’t exist in nature as it does with the manmade domestication of species (Darwin, pgs. 488-489). Darwin also argues that the individuals that have a slight advantage over their opponents will be the ones to succeed, and also to produce the most offspring (Darwin, pg. 491). Of course, these variations occur at a slower pace in nature than they do under man’s thumb, but Darwin argues that this process of natural selection is akin to the manmade version, just slower. He also talks about how natural selection acts through competition and that new species have appeared slowly, though this process of natural selection, though the changes observed are different for different groups (Darwin, pgs. 493, 496). Darwin also talks about how depending on the climate, the adaptions will be different for different species (Darwin, pg. 499). These are several of the arguments that Darwin poses for the argument that evolution is due to natural selection.
I think the most convincing of Darwin’s points that I found most convincing was his argument regarding the selective breeding that mankind using to utilize the aspects of a plant or animal that they find the most useful. I thought this was a particularly convincing argument because he’s right, you can see the definite differences from generation to generation of a species when you selectively breed for a certain trait. He then connected this with the traits that emerge in nature over time as the dominant features of a species, through the process of slower natural selection. This was the most convincing to me.