system
Given the following post, respond as if you're commenting on Reddit:
human
I can't help but feel that the United States has only made the world a worse place to live since the 1950's. CMV!

I've recently been doing a major project in school in which I study how the US has treated Third World countries during the Cold War and what I've found is truly disturbing to me. I'm a history buff, so I already knew that we were never really great at supporting democracies, but I recently discovered that a lot of governments that we propped up killed mercilessly and used death squads to maintain power. And worse yet, a lot of the dictators that we supported were even worse than the Communist governments we were trying to stop. I've read a great deal about how dozens of pro-US, right wing dictators murdered thousands of people all over the world, but with the exception of Stalin, Mao Zedong, Pol Pot and Kim-Il Sung, I can't find a lot of Communists who did the same.
gpt
The question you should be asking is, compared to what?

What other post-WWI power would have done a *better* job of maintaining a modicum of world stability?  The Soviets?  God no.  Germany?  Of course not.  Britain?  Not possible, Britain was a shadow of its former self.  China?  Not an industrialized power, did not have global reach.  France?  ditto Britain.