This website explores the history of a social and psychological experiment carried out by Stephen Reicher and Alexander Haslam, in conjunction with the BBC, in 2001. Partly based on Philip Zimbardo’s Stanford Prison Experiment, the experiment was based on splitting a group of volunteers into two groups of guards and prisoners and observing the consequences, in order to find out why groups resist authoritarianism and why, and under what circumstances, they accept tyranny . The site contains a wealth of resources, including a 3-D visualisation of the prison from where a number of extracts from the original BBC programme can be viewed, tracing the progress of the experiment from Day 1 to Day 8. There are also suggested activities, details of publications that have come out as a result of the study, a timeline, glossary, quantitative data and links to other web resources.