How about 911 and the war on terror, people still think it was Bush's business partner Osama Bin Laden orchestrating everything from a cave. The terrorist are from within our own government and a global network. People are living an illusion thinking they are free, guess again.
911 is up there, but not in the top three as I see them.
Of course there are atrocities carried out on various peoples during recorded history, but the ones I touched on have global implications from an overall perspective.
Brandon
bpherp.com - Breeder of ball python morphs & genetic mutations