According to Wikipedia: "Henry David Thoreau (born David Henry Thoreau; July 12, 1817 - May 6, 1862)[1] was an American author, naturalist, transcendentalist, tax resister, development critic, surveyor, sage writer and philosopher. He is best known for his book Walden, a reflection upon simple living in natural surroundings, and his essay, Civil Disobedience, an argument for individual resistance to civil government in moral opposition to an unjust state. Thoreau's books, articles, essays, journals, and poetry total over 20 volumes. Among his lasting contributions were his writings on natural history and philosophy, where he anticipated the methods and findings of ecology and environmental history, two sources of modern day environmentalism."