It's a never ending argument.

US just made an example out of Iraq to show the world that either you are with us or your country will cease to exist on this planet. We can talk all about their other ventures but the sad fact is, they will continue doing it because they can. Atleast till some other country becomes stronger than them. England ruled most of the planet when they were the strongest economy, USA is doing it right now and in future some other country will do it. That's the way this world has been moving forward.