What major contribution is Walt Whitman known for in literature?

Walt Whitman is primarily recognized for introducing free verse poetry, a form that eschews traditional rhyme schemes and metrical patterns in favor of a more organic and expressive style. This approach allowed poets to explore themes and emotions in a way that felt more natural and reflective of the American experience. Whitman's groundbreaking collection "Leaves of Grass," which he continuously revised throughout his life, exemplifies this style and showcases his innovative use of language and form. His emphasis on individualism and the celebration of the self resonates deeply within his free verse, making him a key figure in the evolution of modern poetry. This significant contribution not only influenced his contemporaries but also laid the groundwork for future generations of poets who sought to experiment with and break free from conventional poetic structures.