According to the inquiry of Aili Education Network, the next sentence of survival of the fittest is survival of the fittest. This sentence refers to the natural law of survival of the fittest in nature All kinds of creatures compete with each other for survival and are selected by nature. If they adapt to natural changes, they will survive; If they don't do this, they will perish.

The original sentence comes from Darwin, an epoch-making book on the origin of species, which puts forward the theory of biological evolution, thus destroying all kinds of idealistic creationism and species invariance.