It's more than a few foods disappearing or people modifying they're homes- it's entire breadbaskets of the world disappearing and entire cities needing to be abandoned.
Well, we have displaced people from different wars right now, but only some predictions on the possible effects of climate change, and I believe consensus among them is not even favoring the "civilization collapse" side.
Human civilization is just not at the point when it can afford to worry about pretty much unpredictable long term global environmental risks.
Human civilization is just not at the point when it can afford to worry about pretty much unpredictable long term global environmental risks.