[throwaway_isms]

>If you want to treat climate change as an existential threat

Chasing that rabbit down the hole, what happens if the US does wean off fossil fuel entirely, but countries like Russia and China continue (and say it is projected to increase 400X like China in the last 30 years). Then its an existential threat, does that mean use of force, or limit ourselves to diplomatic means that will ultimately fail and just accept the resulting existential outcome? Does the analysis change when it is a less diplomatically controversial Country such as India?

Alternatively what if those Countries beat the US to weaning off fossil fuel and determine overnight any continued US use of fossil fuel is an existential threat and act of war?

It sounds like hyperbole but I remember when the US began regulating incandescent light bulbs and it was floated by certain media outlets as an attack on freedom and liberties. We have literally seen murders of people telling others to wear a mask during the pandemic, and I watched a news segment claiming a normal year sees 150-300 FAA incidents on planes and we have seen 1,300 already this year mostly related to passengers refusing to wear masks and many times escalating to attacks on the airline workers for attempting to enforce the CDC mask guidelines. We live in violent and chaotic times, where millions and millions of people allow themselves to be worked up into mobs by a media that does it willfully and deliberately. I don't see it as an easy transition domestically much less globally, and those in power don't care about the science but seem to froth at the mouth for this kind of discontent.