collapse of the old society

I guess maybe I'm missing something?

You're arguing like current climate models predict 8 degrees warming, but my understanding is that a worst case scenario is 4 degrees- the best reference I can find is UN climate summit comparisons[0].

Do you have any references of stuff predicting 8 degrees or is it your personal prediction? If it's the second, I don't really have the knowledge to debate current climate models. If it's the first link me some stuff!

My understanding (based on reading around and nothing else, I'm not a climate scientist) is we're at 2 degrees already, 3 degrees is likely and 4 degrees would be close enough to catastrophic that talking about 5 degrees isn't worthwhile. There's still margin for human society to stop the worst of outcomes.

[0]https://unclimatesummit.org/comparing-climate-impacts-at-1-5c-2c-3c-and-4c/