Beat movement icon and visionary poet, Allen Ginsberg was one of the most influential poets of the twentieth century, and broke boundaries with his fearless, pyrotechnic verse. The apocalyptic "Howl", originally written as a performance piece, became the subject of an obscenity trial when it was first published in 1956. It is considered to be one of the defining works of the Beat Generation, standing alongside that of Burroughs, Kerouac, and Corso. In it, Ginsberg attacks what he saw as the destructive forces of materialism and conformity in the United States at the time, and takes on issues of sex, drugs and race, simultaneously creating what would become the poetic anthem for US counterculture.