Leaves of Grass by Walt Whitman (1855–91). Whitman spent half his life writing, revising, and republishing this collection, which is, at heart, a love song to the idea of America. Uneven and exuberant, Whitman acknowledges that “I celebrate myself, and sing myself,” yet he celebrates all of America in his long-lined free verse. Naming himself “one of the roughs,” Whitman places the natural over the artificial, native wisdom over scholarship, and praises the working man and foot soldier as fulsomely as he does President Lincoln.