A revolution

I remember studying in my history class how revolutions start. There are a lot of theories about the 'formula' that will lead to a revolution. The one that most of my class seemed to favour was the idea that when the gap between rich and poor widens to an extent that the middle class begins to become extinct, a revolution begins. of course there are various holes with that theory but it got me thinking. Why has there been no revolution in the states in the last 20 years?

I suppose you might call the LA riots a mini-revolution, but it didn't accomplish a lot. The rights of all poor people are being trodden. Freedom of speach is on the verge of disappearing. The right to the pursuit of happiness is quickly dwindling away with the new laws on terrorism. (who can pursue happiness if the government might suddenly decide your a terrorist?) The poor are getting poorer under the current government but no one is actually looking at it. The only person that seemed to care about the poor last winter was the Venezuelan President Hugo Chavez. His country is the world's 5th exporter of oil. He used this to export very cheap oil to the poor in the USA. What was the response?

Pat Roberson called for the US government to assasinate Chavez. Now i'm not saying that Chavez isn't playing political games. he is, but he's doing it in a way that i can respect. So when is the US government going to start looking out for the needs of its own people? Or are the poor of the USA going to have to keep looking to the charity of a "third world country"?