As ontogeny recapitulates phylogeny, my hair growing out figures a history of the 60's.

"But while Rochberg rejected serialism, he did not reject the atonal composition out of which serialism had grown and which characterized its harmonic syntax. Instead, Rochberg began to construct his music out of both tonal and atonal languages. In so doing, he dramatically reinterpreted the notion of stylistic uniformity that had been a hallmark of the Western aesthetic since antiquity. He refused to abandon "past" musical styles, insisting that they continue to live—transformed by his individual artistry but recognizable nonetheless—in his new art. By including these diverse musics, Rochberg believed that he had expanded the emotional range that modern music was able to express. He had found a contemporary language that could both bear the weight of despair and point to transcendence."
--from the Rochberg page