If humans don't get married and have children at first, will humans eventually perish completely?

Humans will perish, but genes will not. In fact, if everyone in a society doesn't want to get married and have children, what does it mean? This shows that there is something wrong with the social system, so before the extinction of mankind, this society will be in civil strife, and then a new social system will emerge. If the new system can solve the problem that human beings are not born, then human beings will not become extinct. ? If the social system can't give birth to human beings anyway, then the only possibility is that human beings have achieved eternal life. But as long as there is death in human society, there must be people giving birth. There is no life without death.