Aaron Copland may well be the best-known, the most loved, and the all-around greatest of twentieth century American composers, but his music from the '20s and '30s is still relatively unknown, still relatively unloved, and of still questionable greatness. Was Copland the Modernist too far out to connect to a big audience so he re-created himself as Copland the Populist to become the best-known, most loved, and greatest American composer? But was his Piano Concerto from 1926 really too jazzy and vulgar, his Symphonic Ode from 1928 really too cerebral and severe, his Piano Variations from 1930 really too harsh and austere, and his Short Symphony from 1934 really too rhythmic and complex or was it lack of familiarity made them seem so? From this 1996 recording by Michael Tilson Thomas and the San Francisco Symphony, one would have to vote for the latter because Copland the Modernist is every bit as great a composer as Copland the Populist.
Copland was interested in exploring various methods of composition that might stimulate his melodic and harmonic ideas. It had been twenty years since he had adapted serialism to his own use. He said that "composing with all twelve notes of the chromatic scale can give one a feeling of freedom. It's like looking at a picture from a different point of view." Copland was the first to admit that he did not keep strictly to the rules of serialism. In fact, the sense of a tonal center is rarely missing in the Quartet.
Pianist/composer Conrad Tao's third Warner Classics album, entitled American Rage, traces the roots of rebellion from the 1930s Harlan County labor disputes, through the trauma of 9/11, to the deep divisions of the present day. Bookended by two expansive works by Frederic Rzewski - Which Side Are You On?, based on Florence Reece’s 1931 protest song, and Winnsboro Cotton Mill Blues, an industrial folk song that reflects the unjust factory working conditions - the album centres on Julia Wolfe's Compassion, written in the wake of 9/11, and Aaron Copland's elegiac Piano Sonata.