I think that it has its pros and cons, obviously because everything does.

If everyone (EVERYONE) was restricted to having one child it would be fine. I think if they want a sibling for the child, they should adopt

There are so many kids out there who are orphans or have been abandoned (especially in China) and they all need to be adopted, so why not?

But then this brings me onto the cons. China has child restrictions and that's causing many babies to be abandoned and orphaned all the time (although that's also due to the fact that some families traditionally think boys are better because they can look after their parents when they're elderly. So if they have a girl, she gets chucked away)

IVF is also popular, so people are having more children anyway because they're twins or triplets. This dodges the restriction law.

But i agree, if we don't do something fast then things are gonna go pretty damn wrong. Anyone seen Doomsday? people are packed into street alleyways and this causes disease to spread (i'm not saying people are gonna start turning into zombies haha) and kill people off. No one wants that. We're also destroying the planet and being rather selfish.

I'm pretty sure that when i want kids, I'll adopt I don't care where people come from, so it won't really bother me if the child isn't actually mine. If everyone had one kid of their own and adopted however many more they wanted, wouldn't it improve things dramatically?