stay out of my personal bubble.

Charles Darwin makes many solid arguments in his Origin of Species. The one argument that I think is the best for natural selection is the fact that there is not enough room on the earth for everything and everyone. Darwin and others have calculated that if species were allowed to breed constantly, that the earth would be covered in millions of plants, and by the end of the fifth century there would be fifteen million elephants alive on earth (87). That is a lot of elephants in the room; (awkward…). He claims that nature inherently disallows the survival of some organisms. If the birth rate continued to increase for all species, and the death rate would stay constant, in time there would “literally not be standing room” on the earth (86). Therefore, there must be competition and a struggle to survive so there is enough food, shelter, mates, etc for the selected species. This is one factor that leads to natural selection. Since there is not enough room on the earth for everybody, the strongest and those with the most valuable traits survive.
Earlier in the Origin of Species, Darwin also claimed that humans were involved in selecting what species continued to live and which did not. This variation under domestication is also a strong argument for natural selection. It makes sense that since humans are the ones pretty much ruling the earth, that they could pick and choose what animals are useful to them and which ones don’t help them out all that much. And eventually, these animals “form perfect in itself” and serve a great purpose to humans. So in the end, the space that is available on the earth directly effects nature and the origin of species.