Personally, I don't believe there is such thing as overpopulation. There is ineffective utilization of resources and poor management which can be viewed as inability to adapt. Ancient cities couldn't grow beyond 100K population because they didn't have sewers. Once sewers became widespread, major cities hit 1 mln in just a few centuries. I believe the Earth can host many more people than it does now if resources and space are utilized efficiently and human morale is high.
Do you not believe the planet has a finite size? Because those two things go together.
So my point stands -- the problem of overpopulation is not real as long as humans can adapt technologically, environmentally, and socially. The Earth is a limited space only as long as humans don't have the technology to expand habitable space above (and below) the surface. And above the surface only the sky is the limit. Literally :)
What we can do to reduce population? Education. Worrying about poor people in poor countries having more babies? Educate them and help them to get a proper job - problem solved.
The implication are clear: anything other than GROWTH is taboo.
Most rich countries pension systems depend on sufficient workers to pay for pensioners.
How many rich countries are running a surplus this year in a non-recession year.
In 20 or 30 years with far fewer income earners per pensioner how will it look.
A better and stable system is where generation i pays for generation i.
https://medium.com/@ryandelongpre/how-liberals-are-breeding-...