The crossword solution for the term 'Thoreau Piece' is an ESSAY. Henry David Thoreau was an American author, poet, philosopher, abolitionist, naturalist, tax resister, development critic, surveyor, and historian. 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. His essays, books, and poems have inspired generations of readers and writers.