So many Americans naively believe this fairy story about their country, when the reality is a lot darker and more brutal. The intervention in Iran was neither an isolated event, nor was even close to the first coup that the US perpetrated at the behest of business interests. Starting with Samoa and Hawaii in the 1800s, an extremely violent occupation of the Philippines in the early part of the 20th century, and interventions in Honduras, Cuba, Nicaragua, Haiti, The Dominican Republic and Costa Rica, the US had a long history of this sort of behavior before Iran. Often undertaken under the guise of fighting communism or some other nebulous threat, these acts were in fact naked money grabs intended to secure the dominion of US corporate interests, established during colonialism, over land, labor and assets like oil, lumber and precious minerals in countries where local governments were attempting to seize back control of these assets, and in many cases grant them back to the often poor and rural communities that should have owned them in the first place.
Tim Weiner's book Legacy of Ashes is a good overview of the many "interventions" the US undertook to replace regimes that threatened the economic domination of the West. For the lazy, Wikipedia provides a decent list: https://en.wikipedia.org/wiki/United_States_involvement_in_r...
It's a bizarre sort of internal contradiction that allows people to believe in the overwhelming power of the United States while refusing to accept that the exercise of that power has shaped pretty much everything about the modern world. From Korea, where the US propped up a puppet regime staffed by Japanese collaborators post-WW II, leading to a civil war and partition, to Iran, to Russia, which was bankrupted and impoverished by US interests after the end of the Cold War. Those same interests then hand-picked a certain Vladimir Putin as a successor to their man Yeltsin. Unfortunately, most Americans are entirely ignorant of what actually occurred during these events because they were either never reported in the news, or reported in the distorted and propagandistic fashion that the US media tends to adopt.