Poetry is often viewed as culturally homogeneous-"stubbornly national," in T. S. Eliot's phrase, or "the most provincial of the arts," according to W. H. Auden. But in A Transnational Poetics, Jahan Ramazani uncovers the ocean-straddling energies of the poetic imagination-in modernism and the Harlem Renaissance; in post-World War II North America and the North Atlantic; and in ethnic American, postcolonial, and black British writing. Cross-cultural...