Before the Institutional Review Boards imposed the most basic ethical constraints on psychologists, there was the Stanford Prison Experiment, one of the most famous - and controversial - social psychology experiments in history. In this experiment, Philip Zimbardo, a young professor at Stanford University, randomly selected students to be either "guards" or "prisoners." What unfolded shocked the academy. Find out about this classic example of how circumstances shape human behavior. Simply click "Take the Slide Show to Begin," then follow the narrative through text and videos as the story proceeds through Prelude, Setting Up, Arrival, Guards, Rebellion, Grievances, Escape, and Conclusion.