Nature is like a grand arena, and the constant biological PK is brewing an interlocking biological chain. Man thinks he is the "ever-victorious general" in this arena, or the chairman of the onlookers. In fact, as long as there is life and nature is a part, there will be constant competition. As small as a cell, as big as the whole nature. And humans are just a small team.
Dinosaurs used to be a powerful "cavalry regiment" in nature, but in the face of natural disasters, they were not creative and just disappeared in a short time. Nature is cruel, not clinging to a pile of bones, but continuing to develop and create; Nature is forgetful, and the name "dinosaur" will gradually sink and be replaced by new species, and human beings are the new species created by nature. Nowadays, it is possible for human beings to sigh for their achievements that "there is no one before, and there will be no one after". But when a greater disaster comes, the only creation of mankind is just a pile of garbage. Therefore, the field that needs to defend itself is continuous scientific and technological innovation, and "strength" is endless.
Humility and creativity are the two principles of human society and everyone's motto. Continuous progress and breakthrough are the highest standards of human beings and the essence of "survival of the fittest".
There's another one:
Candle is an insignificant little thing, and now it may never be seen at home again. Before the invention of electric light, candles were the brightest, so they were reused. But after the invention of electric light, even the poor can gradually use it, so it was naturally eliminated.
Dinosaurs existed before humans. They were one of the overlords at that time. All the larger land animals can't escape their killing. Only ants and cockroaches can survive. But with the passage of time and the change of environment, dinosaurs gradually became extinct, but in contrast, small creatures, such as fish, frogs and insects, and large animals, such as deer and horses, survived because they could adapt to various environments.
Dinosaurs could not adapt to various environments, so they were eliminated; Animals such as fish, frogs and insects can adapt to various environments, so they can survive. If they can continue to adapt to the future environment, then they will never be eliminated until they die of old age. Candles were eliminated because they couldn't keep up with the trend of the times, and lamps became the lights that people need now because they kept up with the pace of the times. People are the same. Only by adapting to the environment and keeping up with the trend of the times will we not be eliminated. Survival of the fittest is the truth.