I was recently talking to another DUer about Antonio Gramsci. He had a theory called Cultural Hegemony to explain why the working class were siding with the economic elites in their country. He also had some ideas about creating an alternative media and educational system to counteract the conventional wisdom and thought police set up by the elites. Wikipedia has a good overview of the guy.
http://en.wikipedia.org/wiki/GramsciAnyway, there's a line in The Republican Noise Machine (great book) that mentions the fact that Grover Norquist and some other Neocons took inspiration from Gramsci's writing when they set up the system of right-wing propaganda from the "think" tanks like the Heritage Foundation, to talk radio, to fox News. Gramsci's writings describe exactly what the conservatives have done to take over the media. The irony is that it was the left that was supposed to do this if we ever got our acts together.
The phenomenon in the media that Noam Chomsky writes about in Manufacturing Consent is a detailed account of Gramsci's cultural hegemony theory carried out in the American corporate media. Certain ideas and views are simply not discussed or are ridiculed out of consideration because they are not part of they dominant conventional wisdom that the corporate elites have defined for us.
Another part of Gramsci's cultural hegemony theory is described in What's the Matter With Kansas? by Thomas Frank, which is one of the most exciting political books I've read. That book expounded on so many of the complaints I have about the Democratic party and many of the things I've been saying about the direction the Democrats need to go. It explains how the Republicans have gotten working class voters to identify with the interests of the corporate elites running the Republican Party. Its exactly what Gramsci was writing about.
Gramsci is a very interesting character and his ideas should be discussed more within the Democratic Party. It worked for Norquist.