Will human society fall into the trap of “low fertility rate traps”?

Rousseau, the great French thinker, famously said: "Man is born and free, but there is no shackle." Obviously, he emphasizes that the acquired social civilization and system have a restraining effect on human freedom. Let us not comment on his second half of the sentence, that is, in the first half of the sentence, it is also very problematic. "People are born and free", is it the freedom of "born" or the "born"? Or both are free? For the fertility, the initial fertility behavior is only a natural behavior, and there is no freedom or freedom. For the animal kingdom, giving birth to future generations does not mean responsibility for tending. The reproductive behavior of the animal kingdom is dominated by instinct, and animals cannot control their own reproductive behavior, so we can regard the reproduction of the animal world as part of nature. Since animal behavior cannot be called…