[scarmig]

My argument would be that some kind of coordinated global price on carbon would be an economically cheaper way to prevent and mitigate climate change than arbitrary and unbounded externalization of the costs of it on individuals.

I agree with you that there's a deep and fundamental coordination problem, which is why de facto I think technological solutions will be what have to save us. Which is basically putting many millions of lives at stake with a hope and a prayer, but that's the best we have.