Survival of the fittest is the rule of the world of animals and plants. It also plays the same role in the human evolution. The difference between the natural world and the human's on this point is that the human competition is not as fair as the natural selection. Nobody can survive the wild as the animals and plants without basic equipment. So under the same conditions, the humans are not match for the animals and the plants. This is a fact we can't deny. The human corruption, misrule, kindness and sympathy are responsible for the bad consequence. One day the human beings are likely to die out before the animals and the plants they think inferior to them.