WOW
There has been many times in the past where people rose up and revolted against their leaders. The Arab Spring is not the first or the last time this has happend
It most recently happend in the late 1980’s when the Soviet Union and the Berlin Wall fell. Communist country after communist country (starting with Poland) rose up against the Soviets and the communists and they communists fell.
But there was political instability in the Post World War I era (Czarist Russia fell)
There was instability during the Napoleonic Wars when the ancien regimes began to fall (Most of the Monarchies in Europe fell between the French Revolution and the Russian Revolution)
And some revolutions have failed, The 1905 Revolution in Russia and the 1989 Tianamen Square revolt in China.