Bryant got an early start in his writing career. At the age of 13, he published a successful political pamphlet called "The Embargo." He was about 17 when he wrote "Thanatopsis" (source).
Bryant led the campaign to create NYC’s Central Park (source).
Bryant's fans included all kinds of famous American poets of his time, including Whitman, Emerson, Poe, and Longfellow (source).
Bryant was a newspaper editor at the New York Evening Post for over 50 years, and a generally important and influential dude. For example, he had extensive contact with Abraham Lincoln (source).