Oh I completely agree, billions of people are likely to die at this point, and I don’t see how that can be averted. The big question now if any semblance of our technological civilization can survive this process or not. I’m also expecting massive world instability as a result of the climate breakdown. Countries will go to war over remaining livable land. There will be huge refugee crises as people flee parts of the world that are no longer habitable. Global supply chains will rapidly breakdown, and countries that rely on them will implode internally.

The three main aspects will be access to resources, food production, and energy supply. If a country has energy production secured then it can start creating temperature controlled environments for people to live in and to grow food. This would be a large scale project that would require a huge amount of central planning and coordination to pull off. And the country would need access to material resources in order to build out this infrastructure.