Rolling back to 1830
The gist of the Argentinian position appears to be that we return to the map of the world in 1830 so they get the Falklands, but by that argument we get India, Canada, Australia, large chunks of Africa, etc., etc. back. Sounds like a win for us, though the current inhabitants may or may not be too happy about that. As for the state of Europe, well, that'll be interesting with no Germany, the Prussians back, Italy breaking up, and so forth, and the Turks might like it too.