Looking at the whole biological history of the earth, we can easily find that those organisms that dominate and occupy the highest position in the biosphere can only be one creature, but they can't be two kinds of organisms.
Why is there such a rule? What is the internal procedure that determines the law?
First, there is a competitive relationship between biology and biology. Both in the period of the rule of the dinosaurs and in the period of human rule, the biological community has always followed the relationship between the predator and the predator. Snakes are destined to take mice as food, and the mice are bound to destroy the crops, which are clearly defined. Therefore, the top of the food chain can only have one organism, but not two organisms. Even if there are two organisms, the two organisms will continue to compete until they get the best result.
Secondly, whether the national leadership or a leader, any system organization must have a leader, that is to say, in an environment, there must be one to know the inner workings of the truth, people have more wisdom than other creatures, people are more intelligent, this is the results of selection.
Similarly, in the age of the dinosaurs, and in the process of predator, who has a stronger power and who wins, this is the result of environmental selection.
Moreover, humans and orangutans do have some common genes, but the decisive genes ultimately determine the different status of the two. Although orangutans are bigger in body than human beings, the gorilla obviously has no stronger cerebral cortex, which makes the gorilla unable to share the position of the top of the food chain with humans.
In a word, human beings occupy the top of the food chain, most of which are the result of the environment and the selection of genes. The selection mechanism of the food chain also determines that the top can only be a kind of creature, not two species.