EU is kinda inevitable.
All the nations in the EU have this paradoxical notion of aspiring to be an empire while preserving a high sense of individualism. It's paradoxical because empires are typically multi-national, multi-ethnic. This notion comes from antiquity, as with so many other things, we inherited if from Greece and Rome.
Up to the middle of the last century, the empire was initiated unilaterally, one of the nations tried to conquer the rest. The EU however is a cooperative effort. More or less.
Anyway to fix the EU, the EU needs cheap resources, first and foremost cheap energy. "Renewables" how windmills and solar panels "renew" btw? are they grow on trees? aren't cheap. It's either gas or uranium. Nor the US neither the Arabs are cheap source. It's either Russia or Africa. Both has problems which needs to be solved.
The decision is: either make peace with Russia or unfuck Libya and the Sahel.
While this is getting solved have to severe ties with the US, have to become independent. First and foremost Europe have to be able to "defend" itself. Europe needs an army, and larger nuclear arsenal.
Lotsa money into arms production. Lotsa investments are good for the economy. It's an indirect investment into everything else, since arms manufacturers don't just sit on the moneybags but they spend it.
So: get cheap gas and uranium, and build a large army (perhaps as small as 500K troops would be enough). With navy and air force ofc.