Walt Whitman, an American poet, essayist, and journalist, was born on May 31, 1819, in West Hills, New York. He is among the most influential poets in the American canon, often called the father of free verse. His work was very controversial in its time, particularly his poetry collection 'Leaves of Grass', which was described as obscene for its overt sexuality. First published in 1855 with his own money, 'Leaves of Grass' was a monumental work that he continued to expand and revise until his death. Whitman's poetry reflects his love for democracy, nature, and humanity and features a distinctively American lexicon. His style combined transcendentalism with realism, and his work often presents a journey of self-discovery and confrontation with the mysteries of life. 'The Complete Poetry' captures the essence of his work, showcasing Whitman's innovative use of language and form which shattered traditional verse, infusing it with new rhythms and a conversational tone that widened the possibilities of literary expression. In addition to his seminal poetry collection, Whitman's other works, such as 'Specimen Days' and 'Democratic Vistas', also contribute to his reputation as a thinker and writer deeply connected with the American spirit. Whitman's influence on future generations of writers, both inside and outside America, is immense, touching on themes of equality, freedom, and the intrinsic beauty of the individual and nature.