"Art for art's sake is just another piece of deodorized dog ****." Chinua Achebe's angry dismissal inspires the musical argument for the negative, powerFUL, a concert based around the belief that art can be a political tool. Here is music that gives an impassioned, disruptive clarion call for social consciousness and action. Frederic Rzewski's blistering Coming Together sets a prescient text by a victim of the Attica prison riot, and Louis Andriessen's ear-shattering Workers Union combines freedom and discipline to "express collective solidarity." John Cage intended his percussion work Credo in US, with its satirical use of phonograph records, as a pointed critique of American society, while Matt Marks paints a musical portrait of Glenn Beck and David T. Little sings a love song to crude oil.