[notacop31337]

Climate models might not be civilisation models, but climate has a very large role in the disruption of civilisation models, look at the Sumerians for evidence of climate/regional degradation and the impact that had on their civilisation. And mitigation is only one part of it, when shortages start, it's not just the climate you have to deal with, it's the humans, who are arguably far more vicious and erratic than any weather or climate.