The area of social psychology is very broad with many experiments. One famous experiment is the Stanford Prison Experiment conducted by Philip Zimbardo.
View the video trailer( https://www.youtube.com/watch?v=RKW_MzREPp4)for the Stanford Prison Experiment documentary
Finally, go to the slide show (http://www.prisonexp.org/the-story )on the Stanford Prison Experiment .
After going through the slides (it is somewhat lengthy):