Final answer:
Henry David Thoreau, Margaret Fuller, and Ralph Waldo Emerson were well known for their involvement in the transcendentalism movement.
Step-by-step explanation:
Henry David Thoreau, Margaret Fuller, and Ralph Waldo Emerson were well known for their involvement in the transcendentalism movement. Transcendentalism was an intellectual community mostly centered in New England that emphasized the dignity of the individual and exalted American ideals of freedom, optimism, and self-reliance. Thoreau wrote about living deliberately in nature, while Emerson believed in the divinity within every person. Both Thoreau and Emerson were also involved in the abolitionist and women's rights causes.