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They weren’t reliant on agriculture to sustain their civilisation.

Sure, the human race is unlikely to die out unless we get to mass-exinction levels of climate change, but our civilisation is a lot more fragile.



If agriculture is the biggest worry, it’s no big deal. Not only will more land enter temperate zones, but I don’t doubt we’ll be able to breed heat resistant varieties fast enough to keep up with 0.05C annual changes. That’s nothing.




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