The Untold History of the United States by Oliver Stone is in the most part a condensed analysis of the causes and consequences of the long-term American imperialism plan following WW2.
It briefly covers the atrocities of the other imperialist nations and sets the context for explaining the pivotal moment in history that lead America to present itself as the "police of the world".
It is a must see, it is very well structured and narrated.
The most shocking aspect of American history is the lack of empathy by the American power structure in regards to the millions of death they've caused in other nations since WW2, as well as an apparent lack of justice for American war criminals.
Hitler and Stalin were worse by a huge margin undoubtedly, but this doesn't justify the unjustifiable like Vietnam, Iraq, support of puppet dictators, overthrowing democratically elected governments, arming fanatics, betraying the Geneva convention, lying to the UN, drone bombings of civilians, etc.
It seems that after launching the first atomic bombs the United States of America have been governed by less than brilliant megalomaniacs. Even the wisest and most humanist presidents had little power to stop a long-term military plan for world control.
