Is the USA still the guardian of democracy?

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When the people's resistance againt's the authiroties in several Arab and african countries started,wich start in Tunisia, lots of people look at with one eye on that people movement. But now, many social scientists call it a new democracy movement, even the Research Institute For The World Democracy dare call it a fourth wave of demodracy. We also see, USA who claimed as a country of a guardian the Ideas Democracy in the world, at first time is hestitated to take sides. Between supporting pro-democracy movement of people, or defend tyrants that had been loyal to the polidy of the USA. For example in Egypt, we see how the USA seems very hesitant to support pro-democraacy movement people. Apparently because of Hosni Mubarak is ones of the leader of states in the middle east's who is very loyal to USA and have a good relation with Israel. So I doubt USA s not a guardian the Ideas Of Democracy anymore. Is it possible that democracy as a slogan only by a handfull of wealthy Americans to maintain business continuity in the third worlds areas? Is this my mind is wrong? .........who know's!