many of these revolutions were, in the first place, foreign incited and supported. first covertly, then overtly - supplying bands of fighters with arms.
many of these revolutions are needed, they represent hope for better, from western friend corrupted billionaire rulers monarchs like in Egypt, to leftist anti west Libya.
but the outcome of upheavals might be not much progress. it is a struggle, where western military bombing and colonization is not helping, to say the least.