The Association for Responsible Dissent estimates that by 1987, 6 million people had died as a result of CIA covert operations. Former State Department official William Blum correctly calls this an "American Holocaust."
The CIA justifies these actions as part of its war against communism. But most coups do not involve a communist threat. Unlucky nations are targeted for a wide variety of reasons: not only threats to American business interests abroad, but also liberal or even moderate social reforms, political instability, the unwillingness of a leader to carry out Washington’s dictates, and declarations of neutrality in the Cold War. Indeed, nothing has infuriated CIA Directors quite like a nation’s desire to stay out of the Cold War.
The ironic thing about all this intervention is that it frequently fails to achieve American objectives. Often the newly installed dictator grows comfortable with the security apparatus the CIA has built for him. He becomes an expert at running a police state. And because the dictator knows he cannot be overthrown, he becomes independent and defiant of Washington's will. The CIA then finds it cannot overthrow him, because the police and military are under the dictator's control, afraid to cooperate with American spies for fear of torture and execution. The only two options for the U.S at this point are impotence or war. Examples of this "boomerang effect" include the Shah of Iran, General Noriega and Saddam Hussein. The boomerang effect also explains why the CIA has proven highly successful at overthrowing democracies, but a wretched failure at overthrowing dictatorships.
"It is the function of the CIA to keep the world unstable, and to propagandize and teach the American people to hate, so we will let the Establishment spend any amount of money on arms."
-- John Stockwell, former CIA official and author