Leaves of Grass is a poetry collection by the American poet Walt Whitman (1819-1892). Though the first edition was published in 1855, Whitman spent most of his professional life writing and re-writing Leaves of Grass, revising it multiple times until his death. This resulted in vastly different editions over four decades-the first a small book of twelve poems and the last a compilation of over 400.The poems of Leaves of Grass are loosely connected, with each representing Whitman's celebration of his philosophy of life and humanity. This book is notable for its discussion of delight in sensual pleasures during a time when such candid displays were considered immoral. Where much previous poetry, especially English, relied on symbolism, allegory, and meditation on the religious and spiritual, Leaves of Grass (particularly the first edition) exalted the body and the material world. Influenced by Ralph Waldo Emerson and the Transcendentalist movement, itself an offshoot of Romanticism, Whitman's poetry praises nature and the individual human's role in it. However, much like Emerson, Whitman does not diminish the role of the mind or the spirit; rather, he elevates the human form and the human mind, deeming both worthy of poetic praise.With one exception, the poems do not rhyme or follow standard rules for meter and line length. Among the poems in the collection are "Song of Myself", "I Sing the Body Electric", "Out of the Cradle Endlessly Rocking". Later editions included Whitman's elegy to the assassinated President Abraham Lincoln, "When Lilacs Last in the Dooryard Bloom'd". Leaves of Grass was highly controversial during its time for its explicit sexual imagery, and Whitman was subject to derision by many contemporary critics. Over time, the collection has infiltrated popular culture and been recognized as one of the central works of American poetry. Walter "Walt" Whitman ( May 31, 1819 - March 26, 1892) was an American poet, essayist, and journalist. A humanist, he was a part of the transition between transcendentalism and realism, incorporating both views in his works. Whitman 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.Born in Huntington on Long Island, Whitman worked as a journalist, a teacher, a government clerk, and-in addition to publishing his poetry-was a volunteer nurse during the American Civil War. Early in his career, he also produced a temperance novel, Franklin Evans (1842). Whitman's major work, Leaves of Grass, was first published in 1855 with his own money. The work was an attempt at reaching out to the common person with an American epic. He continued expanding and revising it until his death in 1892. After a stroke towards the end of his life, he moved to Camden, New Jersey, where his health further declined. When he died at age 72, his funeral became a public spectacle....