The Beatles' "Revolver" (August 1966) furthered the album-as-art perspective and continued pop music's evolution. Led by the art-rock single "Eleanor Rigby", it expanded the genre's scope in terms of the range of musical styles, which included Indian, avant-garde and classical, and the lyrical content of the album, and also in its departure from previous notions of melody and structure in pop songwriting. According to "Rolling Stone", ""Revolver" signaled that in popular music, anything – any theme, any musical idea – could now be realized." As with "Rubber Soul", the album inspired many of the progressive rock artists of the 1970s, and each of its songs has been recognised as anticipating a new subgenre or style.