It is indeed unprecedented in the Arab world that PUBLIC protest was able to bring about regime change. It only happened "now" in Tunisia and Egypt. Previously, regime change was brought about by force of arms. So there is something that was unexpected. But a "revolution" is not an instantaneous event; rather, it is a process that lasts some time. The French Revolution (1789) ended with Napoleon installing himself as emperor, not quite a Democracy. Arab revolutions, in Egypt, Syria, Iraq and more, ended up with various regimes which amounted to dictatorships under various names. A closer to home example: Hamas was elected in free elections, but its regime is no Democracy. Egypt may show that such a result is not inevitable, but it is way too early to tell. After all, the Muslim Brotherhood is the most organized Egytian party in the country and may duplicate the Hamas success. There is good reason to fear the ultimate outcome, although we should also be hopeful that the revolution will end up with a democratic and peaceful regime.
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from the article: Israel hopes Egyptians receive the freedom they seek, Peres says