Love this essay by Michael Kimmelman in the NY TIMES. This point in particular really struck  a chord:

Generally speaking, culture operates within the mainstreams of power. The myth of an avant-garde serves the same market forces avant-gardism pretends to overthrow. Art may challenge authority; and popular culture (this includes clownish demagogues like Glenn Beck) sometimes makes trouble for those in charge, the way Thomas Nast’s cartoons did for Boss Tweed in Tammany Hall. But art doesn’t actually overthrow anything except itself, and never has, not in 19th-century France or 20th-century Russia or 21st-century China or Iran. Even when it manages to tilt popular thinking, it still ends up within the bounds of existing authority, and there has never been a true “outside” that really stayed outside: public consumption, by definition, adapts to the change, co-opts and normalizes all culture.

Read the rest here.