If you want to see most worst pictures and read the worst stories of civilians being abused, tortured and murdered you have to go back to the period before the USA took on the role of World cop and promoter of human rights and justice. Check out what the Japanese, Nazi's and Stalin were doing. And before that the colonial rulers like Britain, France and the other European "Empires". Those colonial powers have abused people since they got out of the middle ages and that period of time was, well, the ******* middle ages.
The world has never seen the kind of peace and justice since America took charge after WWII. Not perfect, but when in history has a nation sent it's blood and treasure across the world to save people or make people free or give people a shot at governing themselves?
I can agree with much of that.
However NOT intervening in other nations affairs, either militarily or covertly (what libertarians demand), does not prevent the US from doing good. In fact, the US would be far more respected world wide if we demanded peace first and foremost...and stopped intervening militarily and covertly. Ukraine is a good example...it is very likely peace would exist there if not for America's covert intervention.
These many decades of foreign interventions have caused much death and destruction. So had we not intervened, it is very possible there would have been LESS death and destruction.
The big problem is allowing corrupt and conniving politicians who can never be trusted, with the power to take our nation to war. This needs to stop. History clearly tells us granting politicians war powers is a terrible mistake.