The Descent of Man, and Selection in Relation to Sex(Darwin, Charles)
1. All life on Earth comes from one stem. We know well that humans and all other vertebrates were created according to the same universal model, that they all have the same early stages of embryonic development, and that they also have certain traces in common. We must honestly admit that they all branched off from the same lineage. moible e-book : 22p All vertebrates, including humans, started from similar-looking embryos, and their appearance, purpose, and function differ depending on each gene. Based on this, all living things on Earth are differentiated into species like countless branches extending from one stem. I think that the misconception that humans are the only different beings on Earth is an error that must be avoided. The reason why many creatures can live on Earth is because the sun, water, oxygen, and various organic substances are optimized for living things. The Earth does not exist for us; we are just parasites on the Earth. Each has evolved to fit the environme...