And large countries and blocs like the US, China, EU, India, etc would survive in a world with significant climate crises. So the incentive to change doesn't exist.
And this is why the world will burn.
I have no proposal because to a certain extent you are correct.
That said, investing trillions in GreenTech does nothing when China is still emitting 13 gigatons of CO2, and it takes the next 7 countries combined to reach that number. Additionally, India will likely end up emitting a similar amount as China within a decade as well.
Only the leadership of the US, China, and India can decide on a roadmap on how to reduce CO2 usage globally, and everything else is just rhetoric.
China endured famines for centuries, introduction of nitrogen fertilizers helped to solve this problem.
"The meeting of Mao Zedong and Nixon in 1972 changed drastically the fundamental relation between China and USA. In 1973 China contracted importation of 13 large-scale ammonia plants with 330,000 t/y capacity and urea plants with 500-600,000 t/y capacity with the companies of USA, Japan and Europe."