> That doesn't happen between democracies and hasn't for generations, except for one democracy recently.

Neoliberalism and globalization is what guaranteed this. That is, Pax Americana. The US thought it was a great idea to become the reserve currency of the world, and became a net importer to spread the dollar. The dollar hegemony gave the US great influence and it defended it with its military. Becoming a net importer hollowed out the US industrial base as it moved overseas, which was fine until China speedran owning large parts of the industrial production and exportation. They also very quickly moved up the ranks of economic and geopolitical sway.

Now the US is ditching globalization for more mercantilist policies. That means the US will be less influential in a multi-polar world, as it can no longer strongarm so easily through the dollar. Trade will become more closed off as other countries rush to do the same now that they are less supported by the US military and economic influence and need to defend themselves more.

Thus, I wouldn’t discount the possibility that the EU stops cooperating as much with SK in the future