[belorn]

Humans can definitively adapt. Historical when there has been a bad harvest, invading a nearby country which has it better has always been an available option. An alternative solution that humans been up to to handle change is to produce a social rules (like a price roof) so that other people carry the load when the weather provide a bad turn. There is no question that humans can adapt, only a question if that adaption is good for society with some definition of good.

If we imagine a society where production become based on the availability of energy through optimal weather, we would have to ask what the cost of that adaptation is and if alternative solutions, say nuclear energy, would be cheaper. The best adaption can simply be to use the correct tool for the job, a tool which may be more optimal in some climates but less so in others. If there is something humans excel at it is to adapt to nature and produce local solutions to local weather conditions.