Henry David Thoreau (1817-1862) was born in Concord, Massachusetts. Thoreau attended Harvard University where he met Ralph Waldo Emerson, with whom he would have a complicated but impactful friendship. After graduating, he became a teacher but resigned after just two weeks. Following a brief stint helping at the family business, pencil-making, Thoreau started a small school with his brother that survived for three years before closing. Thoreau then began dedicating his life to writing, and submitted poetry to a magazine. This magazine was made by Emerson and others in the Transcendentalist movement, which celebrated individualism, emotionality over rationality, and intuition.

In 1845, after little success and a return to his family's business, Thoreau moved to a piece of land on Walden Pond, on Emerson's land and built his own home. He largely lived off the land, spent his time in nature, and writing about his observations and thoughts. The latter made up the famous book "Walden" which is composed of a series of essays. Partway through his time at Walden, Thoreau refused to pay his poll taxes and spent the night in jail. Though his aunt paid it and got him out the next day, these events were impactful and led to his essay "Civil Disobedience" in which he wrote about resisting an unjust government that promoted imperialism and slavery. He continued writing about abolition until his death in 1862.