Henry David Thoreau, (born July 12, 1817, Concord, Mass., U.S.—died May 6, 1862, Concord), U.S. thinker, essayist, and naturalist. Thoreau graduated from Harvard University and taught school for several years before leaving his job to become a poet of nature. Back in Concord, he came under the influence of Ralph Waldo Emerson and began to publish pieces in the Transcendentalist magazine The Dial. In the years 1845–47, to demonstrate how satisfying a simple life could be, he lived in a hut beside Concord’s Walden Pond; essays recording his daily life were assembled for his masterwork, Walden (1854). His A Week on the Concord and Merrimack Rivers (1849) was the only other book he published in his lifetime. He reflected on a night he spent in jail protesting the Mexican-American War in the essay “Civil Disobedience” (1849), which would later influence such figures as Mohandas K. Gandhi and Martin Luther King, Jr. In later years his interest in Transcendentalism waned, and he became a dedicated abolitionist. His many nature writings and records of his wanderings in Canada, Maine, and Cape Cod display the mind of a keen naturalist. After his death his collected writings were published in 20 volumes, and further writings have continued to appear in print.
