The Milgram experiment and Stanford prison study have by now become seminal standpoints from which to analyze human behavioral patterns when subjected to authority. They were both controversial and extremely successful in understanding how we as humans behave when given unconditional freedom to exert force or inflict torture on another individual or group, without even first wanting to know the victim’s crimes or any justification for the act. Just the fact that it was an order from above and the “torturers” are given full reign over the environment is enough for them to condemn the victims or make them commit ghastly and demeaning acts.
This video on Google links the Stanford study with the events of Abu Ghraib, which of course means that the Stanford experiment, was with a very high probability, successful in duplicating such real world situations; cases where the people involved don’t quite fathom the power at their hands and wield it recklessly to commit some worse-than-murder acts of violence and terror.
Another interesting aspect to the experiments is how they were a form of mind control. Give enough power to the people and make them believe, even loosely, that what they are doing is right, and they’re ready to do anything you want. Dr. Nils Bejerot later developed another psychological theory, called the Stockholm Syndrome, based on events of a robbery in Stockholm where the hostages actually defended their captors.
I guess it’s highly likely that with the right amount of pressure, even the sanest and most rational human being on Earth can be converted into a member of your terrorist gang or religious cult or anything else that you fancy. Just goes to show there’s simply no such thing as free will.