I agree. I guess I worded it wrong. When I refer to 'national' I'm more picturing a world without nations, per say.
I believe an answer to a lot of problems going on right now is to decentralize government and have overlapping bi-laws of sorts. I think we, as a species have outgrown nations and centralized government. If we are going to continue in the direction of globalization of industry, resources, and economy we can't have random borders hindering the flow of whatever it is we are trying to move. It especially starts to make sense when you look at some of the countries that are getting royally screwed right now due to the borders that were drawn by others (Africa would be the prime example).
To bring this all back to the actual topic of this thread, it's not like America's "idealistic" wars are anything new to humanity. Europe was all over that shit when they were the empires at the time. In the end though, there is a true agenda behind every idealistic war ever fought. The idealism they put forth is, for the most part, the governments way of getting the people behind them, allowing the war to go forth in the first place. In the end, all wars are fought for resources at their root.
To eliminate nations and modern centralized governments might not end wars, but I think it would be a step in the right direction for humanity. Of course, this would open a whole new can of worms: trying to evenly disperse resources to everyone equally seams like an impossible task at this point in time, but it has to happen eventually if we ever want to progress as a species and survive. Humans can be a stubborn species, and to fully accept different ideologies without judgement might be the biggest hurtle we will face in the near future. I mean, racism is still a very real thing all around the world... and it's completely illogical.
Now that I've gone and said all that, bring on the opposition!