Allen Ginsberg's Howl was published in 1956, becoming the Beat Generation's defining text and triggering obscenity trials that tested free speech limits. The Beats—including Jack Kerouac, William S. Burroughs, and Ginsberg—rejected 1950s conformity, celebrating spontaneity, sexual freedom, Eastern spirituality, and rejection of materialism. Their spontaneous prose and performance-oriented poetry challenged academic literary establishments and influenced countercultural movements.

Beat poetry revolutionized American verse through free-form improvisation, jazz-influenced rhythms, and confessional directness. Ginsberg's long-line breath-based verse broke from traditional metrics, influencing later spoken word and slam poetry. The Beats' emphasis on authentic personal experience over polished craft encouraged raw emotional expression in poetry. Their incorporation of everyday speech, profanity, and taboo subjects expanded poetry's acceptable content, while performance aspects anticipated contemporary poetry's return to oral traditions and public engagement beyond page-bound elitism.