The Stanford Prison Experiment was a psychological experiment on how prisoners and prison guards react to being put into an evil place. The experiment was conducted in the basement of Stanford University in 1971. The prisoners were college students, and they were picked, surprisingly, at their own houses by the police.
The participants of the experiment, played their role well, the guards were acted powerful and authoritarian; and some of them even abused the power they had. And the prisoners obeyed the guards until they started to break. Some wanted to leave before the experiment was finished, and they eventually did.
The experiment was interrupted before it got completed. A lot of variables played a part in this unexpected stop. The prisoners that quit, the superintendent not having an impartial supervisor, and the guards stepping over boundaries.