No, European Union is different. And had different start. It was formed after war, so after any catastrophies, not before as the Intermarium could have been formed. This is why EU had more chances to exist. And other countries were joining, due to some promises. EU is changing, new laws, etc. Some countries joined "different" EU than it is now.

But generally I don't give a fu.ck about EU's problem. For instance – I smoke Belarusian cigarettes. Not Polish with European prize. :p

"Men since the beginning of time have sought peace. Various methods through the ages have been attempted to devise an international process to prevent or settle disputes between nations. From the very start workable methods were found in so far as individual citizens were concerned, but the mechanics of an instrumentality of larger international scope have never been successful. Military alliances, balances of power, Leagues of Nations, all in turn failed, leaving the only path to be by way of the crucible of war."

General Douglas MacArthur