> world peace for the last 50 years

I think you might have a different definition of "peace" than many people because we haven't had "world peace" for 50 years at all. Just look at how many conflicts are currently ongoing in the world (and how many of those are caused by US meddling...)

In fact, a larger majority of the world consider that the USA is the very power that has kept the world at war for the last 80 years .. and they're kind of right.

Ask the orphans of Iraq, Afghanistan, or Syria how peaceful the U.S.is

Remember peace is most probably a byproduct of total US hegemony. Russia and China have been very peaceful last 30 years and they were not dominated. So I wouldn't attribute the peace of the world to the "invisible US hand"...

> world peace for the last 50 years

By 'world' you mean Mars, right?