What will happen to the world's population?

I think it's in the due of collapsing down to 3 billion over the large course of time. In Saudi Arabia woman used to have 6 children but now are only having a average of 2.5. In fifty years there will be no Japanese if thing keep on going at the rate that it is. Europe has serval country's that are going below the replacement rate. I wounded if there is some kind of chemical or other force of nature that causes fertility rates to drop. Locusts swarm once there is the exact number of 76 bugs per square meter. Is there a hidden mechanism inside of People that controls the population or is it all false and we are just going to keep getting more and more people?

Lower birth rates are due to the feminization of men and the masculinization of women. Men are too afraid to approach women, for a number of reasons, and are more interested in things like video games, comic book forums, porn, etc. Women are encouraged to become career-oriented as opposed to child-rearing.

Smartphones, computers, game consoles, relationships with life-like robots, and virtual reality will continue to decrease one-to-one human interaction and further retard the social skills of people. Consequently, birth rates will fall even further.

Sex in itself has been degraded to pure physical gratification without any responsibility, and so people treat it as such. It used to be that sex was a pleasurable act between two loving and committed people that was frequently used to procreate. Now, it's an exchange of pleasure between any two people and child birth is easily avoided through contraception and abortion (murder).

However, people who are from less "advanced" cultures still have "old" values. They still believe in procreation. They still value rearing children. They still value traditional families. And guess what? They're probably going to replace the Japanese and Anglo-Saxon culture and people. Is that a good thing? Go look at the countries of these cultures and tell me if it's a good thing. Go look at Mexico, for instance.

WELCOME TO THE FUTURE!

Well... I mean there is that whole climate change mass extinction thing...

Also people used to have more children, because fewer children would survive until adulthood..

I think it will be fine and tbh I don't even think its being projected to start going down any time soon. Chances are that within 20 years it will be over 10 billion from the 7 billion its at now barring any sort of catastrophic events.