The truth is that evil survives by tricking the good into doing its will. Without thousands of basically decent people confused enough to obey, evil would fail quickly. The great tragedy of our era is the extent to which evil has been successful in convincing people to service it. Good people having yielded their wills arm evil, accommodate evil, and acquiesce to its actions.
In the end, these people don’t make up their minds. Rather, they take on the minds of their overlords and do their will. And so, the vast majority of evil done on Earth traces back to minds and wills that have been abandoned to fear and laid on the Altar of Obedience.