You have an uneducated opinion about world politics and peace. A revolution in military affairs and international systems is under way and the character of conflict is changing as globalization increases. Non-state actors, failed and rogue states, internal crisis and atrocity situations, stability and support ops, etc, is the name of the new game. This isn't 20th century realm of balance of power and strict state sovereignty. International institutions, organization, integration, and democratization is the new approach to preventing and dealing with armed conflict. Collective security is more important than ever. Cooperation and engagement is key.
I personally think NATO is important, even more so than the UN, and the Europeans need to uphold their end of the bargain.