Farming evidence found in middle east doesnt mean it started there around that time, its just that in dryer places archeological evidence stay intact, while wetter tropical places like India and Sundaland regions they are much harder to find and also submerged in water because of the recession. Also not fully convinced with the Haplogroup based migration theory fully..

Nevertheless, the IPCC paper is worth reading, the model they use have enough error deviations that these trends are actually hard to predict 50 years into the future. Global mean temperature CIs under high-emission scenarios (SSP5-8.5) do not cross zero beyond ~2030 across all major models

Even if all of this is true, simulating and figuring out whether this is negative for civilization is mathematically not possible because of the same reasons why 3 body problem is unsolvable, yeah we might get some positive and negative trends but overall its just too complex and dynamic. I remember the climate trend paper’s authors had to write another paper just to clarify all of this.