For an example of how things can go wrong even in Europe, despite all of what you listed, just look at the Balkans.
I’m quite convinced that the EU and its predecessors were instrumental in keeping Western Europe very stable and very peaceful. The cold war helped, sure, but even 24 years after the end of that stability and peace aren‘t even threatened a little bit. Conflicts can and are routinely solved politically, not through any passive aggressive grandstanding that marks so many other international relationships. (I have always said that to judge supra-national institutions you have to look at how they deal with conflict, not how often they agree or how harmonious they sound when everyone has the same opinion. Those institutions exist to work constructively on solutions for conflicts and problems, that’s when you have to evaluate them. And there is nothing wrong with differences in opinion existing if institutions are in place to resolve that and find a compromise.)
Additionally the EU has been very profitable for very many European companies. Creating a common market (still imperfect and still more to profit companies than people, of course) has been a major advantage for everyone.
I’m quite convinced that the EU and its predecessors were instrumental in keeping Western Europe very stable and very peaceful. The cold war helped, sure, but even 24 years after the end of that stability and peace aren‘t even threatened a little bit. Conflicts can and are routinely solved politically, not through any passive aggressive grandstanding that marks so many other international relationships. (I have always said that to judge supra-national institutions you have to look at how they deal with conflict, not how often they agree or how harmonious they sound when everyone has the same opinion. Those institutions exist to work constructively on solutions for conflicts and problems, that’s when you have to evaluate them. And there is nothing wrong with differences in opinion existing if institutions are in place to resolve that and find a compromise.)
Additionally the EU has been very profitable for very many European companies. Creating a common market (still imperfect and still more to profit companies than people, of course) has been a major advantage for everyone.