History does not enable us to predict the future, but it does help us to prepare for it. It therefore makes sense that commentators are searching for historical precedents to the dramatic events in Egypt. History might help shed light on where the potentially revolutionary developments are heading. It is important to get the history right, however. Some commentators have suggested that the world might be witnessing a repetition of the events of 1979, when an Islamic revolution overthrew the Shah of Iran.