

In 1817, Henry David Thoreau was born in Massachusetts.

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.

Thoreau's books, articles, essays, journals, and poetry total over 20 volumes. Henry David Thoreau (born David Henry Thoreau) was an American author, naturalist, transcendentalist, tax resister, development critic, philosopher, and abolitionist who is best known for 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.
