Hannah Arendt had it pegged as far as I'm concerned.

“The greatest evil perpetrated,” Hannah Arendt wrote, “is the evil committed by nobodies, that is, by human beings who refuse to be persons.”

As Arendt pointed out, we must trust only those who have this self-awareness. This self-awareness comes only through consciousness. It comes with the ability to look at a crime being committed and say “I can’t.” We must fear, Arendt warned, those whose moral system is built around the flimsy structure of blind obedience. We must fear those who cannot think. Unconscious civilizations become totalitarian wastelands.

“The greatest evildoers are those who don’t remember because they have never given thought to the matter, and, without remembrance, nothing can hold them back,” Arendt writes. “For human beings, thinking of past matters means moving in the dimension of depth, striking roots and thus stabilizing themselves, so as not to be swept away by whatever may occur—the Zeitgeist or History or simple temptation. The greatest evil is not radical, it has no roots, and because it has no roots it has no limitations, it can go to unthinkable extremes and sweep over the whole world.”