EU has done really well on passing big laws such as GDPR in the recent years, while the US can't even seem to decide whether to fund their own government. Why do you think Europe is doing better than the US? One would think that since EU is more diverse it would be harder to find common ground. And there were examples of that during the Greece debt crisis. But not anymore, it seems.
The entirety of Europe has historically been one big civil war for as long as the individual states have existed. Let's say the Roman empire started it and NATO ended it.
Me here in Finland… Yeah Europe has no civil war tradition… USA hey waiting for like half century is rookie numbers. We had ours going less than month after our independence and managed to kill a whole percent of our own population in it.
That's a very optimistic look at the "NATO ended it". There are conflicts within the EU / NATO. Greece vs Turkey, Cyprus, etc