Well over 20 million human beings in the last 50 years, mostly civilians

From Fred Branfman's "World's Most Evil And Lawless Institution? The Executive Branch Of The U.S. Government":

All told, U.S. Executive Branch leaders – Democrats and Republicans, conservatives and liberals - have killed wounded and made homeless well over 20 million human beings in the last 50 years, mostly civilians.

U.S. leaders have never acknowledged their responsibility for ruining so many lives, let alone apologized or made proper amends to the survivors. Those responsible have not been punished, but rewarded. The memory of it has been erased from national consciousness, as U.S. leaders endlessly declare their nation’s, and their own, goodness. Millions of civilian lives swept under the rug, forgotten, as if this mass murder and maiming, the destruction of countless homes and villages, this epic violation of basic human decency—and laws protecting civilians in time of war which U.S. leaders have promised to observe—never happened.

...[T]he practical part of ourselves, the part that needs to make a living and maintain emotional equilibrium, leads us to ignore the mass evil our leaders engage in. It is so much easier. For accepting this truth means accepting that our leaders are not good and decent people; that JSOC commandos are not "heroes" but rather lawless assassins whose very existence shames us all; that we are not being protected, but endangered by leaders who are turning hundreds of millions of Muslims against us; that we must assume that Executive officials are right now secretly engaging in a wide variety of illegal and immoral activities that would shock and disgust us if they were revealed; and that we cannot believe a word they say when these abuses are revealed as they so regularly engage in secrecy and stonewalling, lying when discovered, covering up when the lie is revealed, and claiming it was an aberration and/or blaming it on a subordinate when the coverup fails.