Though American composer Frederic Rzewski is best known for his powerfully moving scores responding to social and political uprisings around the world, one of his earliest pieces was of a more familiar variety—a string quartet, composed when he was just 17 years old. Now approaching 80, Rzewski is still composing. For his second appearance on the Composer Portraits series, Miller highlights this very early work, followed by the world premiere of Rzewski’s latest string quartet, co-commissioned for the occasion.