Europe will be thrown into chaos if the AMOC actually fully collapses. Minimum temperatures in the north and west dropping twenty degrees celcius will wreak havoc on harvests, put pressure on trade relations, and will probably drain several large cities. No doubt one asshole biding their time will take the chance to start a war in Europe amidst the chaos.

From what I've read, a full collapse is unlikely, though. Plus, preventing this from happening requires a concentrated worldwide effort, which seems unlikely with the leader of the leading greenhouse gas emission source per capita having gone on record saying climate change is a Chinese conspiracy.

At this point, I think a lot of governments are just hoping the best case scenario is right, because there's hardly anything we can do if the AMOC does indeed start collapsing fully, other than southbound mass emigration.

We just need to drop all the emission policies so the temps go up /s