The low birth rate isn't helping us because everyone is vying for a high standard of living, even the developing countries. The Earth can't sustain a philosophy of "developing nations" that want to lift billions of people out of poverty. The only thing I can see saving us is a feasible fusion reactor technology because it would supply all the energy needed to create any materials we need. But... greedy and powerful humans would find a way to fuck that up too, or keep it for themselves.Something worth noting though. The west's birth rate is actually very low. As far as births go, that's not our problem.
Our problem is people are living longer and longer. So lower birth rates still result in larger populations because fewer are dying.
So just instituting something like one child in the west makes no sense. From a pure pragmatic point of view, it made sense for China, but not us.
Really, human nature is the problem, and people's unwillingness to do any kind of work to raise their consciousness, combined with people in power who ensure that we are all hypnotized by non-sense.
For things to work out without a large scale calamity like economic and environmental collapse, the west would have to accept a downgrade in standard of living and learn the art of conservation; the "developing" countries would have to alter their course and not continue pursuing the goal of emulating the United States, who consumes more of the world's resources than anybody via its people stuffing their fat fucking faces until they need motorized wheelchairs to get around.
China doesn't need the one child policy anymore because they are implementing the social credit system. If you get a low social credit score, then you won't be able to function in society, and raising a family would be impossible. Their social credit system will ensure an even higher level of conformity and less resistance. To me, this is far more frightening than the one child policy ever was. They really are about to become 1984 over there.China got rid of its one child policy ever since xi jiping the new adolf hilter got in. Now china has a totally different apporach and that is to take over the world for the han Chinese dream of world domination. Our stupid leaders have let it run rampant now but it will eventually result in a full blown world war 3 and forced conscription of every abled man in the western world and japan and south east asia to defeat this new evil.
As for WWIII with China and the other stuff you said... that's all a fantasy fueled by the old fears of the Red Tide. China is unstoppable. All of our manufacturing is there, and despite Trump's browbeating, we are utterly beholden to China. If they banned U.S. manufacturing tomorrow, or dumped the trillions in U.S. treasury bonds that they own, the U.S. would enter another Great Depression literally overnight. They invested in us, we invested in them, all for short term gain. Now our economies are stagnating and the end is nigh. China is building fake, empty cities to artificially prop up their GDP, and the U.S. is trying to implement tariffs to undo the horrible mistake they made to domestic business. It's too late... we are screwed.
The U.S. is now a waning power. It still has military might but its influence is diminishing. It squandered all of its power and resources on private interests in the Middle East. China's Belt and Road initiative will permit it to become an even more formidable economic force. I don't think people realize just how big China is about to become, and without engaging in a single war. All they had to do was form economic treaties and partnerships with all the countries that the west has shunned for ideological, humanitarian or political reasons. China says... we don't care how we treat your people, we just want to do business. Now they have treaties with corrupt countries that are renting them land and ports for 99 years.
China is smart, and they don't have the same humanitarian strictures that we have. It's why they're winning. I'm not saying I support this. After living in that shithole of a country, I actually dread a world where Chinese culture becomes dominant. I want to see western institutions remain in control, but with major reforms. Calling for war with China is part and parcel with the simple-minded stupidity that the western corporate media is selling the public. The issues are actually far, far more complex.