"Human beings, regrettably, are easily conditioned to the notion that other sorts of people are different, inferior, intrinsically dangerous. Education is no protection against such conditioning—indeed, the leaders and propagators of political violence are commonly from among the well educated. But an intrinsic feeling of superiority, or necessity, is not enough: the torturer must be placed in an appropriate role. Zimbardo demonstrated the importance of this when he placed students in a mock jail, some as prisoners, others as guards. Within a few days the experiment had to be stopped, such was the treatment meted out to the prisoners by the guards. The torturer may see himself as a defender of humanity, when all the while his conduct is dominated by brutality and corruption. In areas where torture is well established, people are swept up off the streets on a suspicion or a word; bribery secures release, and maladministration results in detention or even execution of the innocent."