> the world has been a safer place over the last 70 years because there's a global cop who's willing to use force to keep the peace.

No, the world has become a safer place for us because we live in nations with nuclear weapons, and they're a pretty good deterrent for attacks by other nations. The world is still a very unsafe place for many people, partly because of this self-proclaimed 'cop'. If you think the US has this military might for any other reason than ensuring it's own political and economical wellbeing, I'd like to know what it is. It sure isn't to "keep the peace" - they're selling a bit too many weapons to questionable figures for that.