That is revisionist history.
We saved the world from Hitler's Germany in WWII, but America was still essentially a freedom-loving Christian nation with no interest is controlling the world. Japan is a good example. After helping them recover, we left them alone.
I’m purely talking economics. We supplied the world with goods, while the bombed out countries were slowly rebuilding their industries. Of course the US was doing very well then.
Well, we imposed a Constitution on them. And we still have 24 military bases in Japan.