So no US equals no wars?
Not at all. There could be plenty still. But, that isn't the point here. However, the US in the mix also isn't stopping many wars it seems. War is part of the wealth generation machine. They are like controlled demolitions to drive economic growth.
I'm not implying we are blameless at all, but I think a lot of people like to gloss over the good things and lay 100% of the blame at our feet. The rest of the world got a head start on us, maybe after another 750 years we will be as refined as Europe.