Dear @ga38jem

Another solid piece of work. Upvoted already :)

You've asked some interesting question:

Is our World doomed of overpopulation?

I think that by now it's very clear, that developed countries are facing opposite problem: not enough kids being born. Population is steadily declining and most likely this process will only going to accelerate.

Why is that? I would say that mostly because of growing cost of living. Mainly cost of accomodation. Right now parents can hardly afford to have more than one kido. Even if they would like to have two, then they will face a challenge of not being able to afford bigger housing.
And this issue is only going to get worse.

At the same time if we look at countries full of poverty, then we quickly may realize that situation is opposite in those places. Families are poor, but large.

Enjoy your day buddy,
Yours Piotr