Ralph Waldo Emerson
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Transcendentalism is an American literary, political, and philosophical movement of the early nineteenth century, centered around Ralph Waldo Emerson. Other important transcendentalists were Henry David Thoreau, Margaret Fuller, Amos Bronson Alcott, Frederic Henry Hedge, and Theodore Parker.
Goodman, Russell, "Transcendentalism", The Stanford Encyclopedia of Philosophy (Fall 2013 Edition), Edward N. Zalta (ed.), URL = <http://plato.stanford.edu/archives/fall2013/entries/transcendentalism/>.