It's going to be a pretty damn hard sell to any of the richer countries at this time, especially as more or less everyone is wrestling internally with the pressure caused by right-wing populism. The positives of any such development haven't been all that well detailed so far + given how EU bureaucracy works would be put under the looking glass immediately anyway => I don't see much success any time soon.
Barring some major world-shaping event e.g. war, catastrophic environmental disaster hitting the rich countries etc.
Barring some major world-shaping event e.g. war, catastrophic environmental disaster hitting the rich countries etc.