Ralph Waldo Emerson Ralph Waldo Emerson (May 25, 1803 – April 27, 1882), who went by his middle name Waldo, was an American essayist, lecturer, philosopher, abolitionist , and poet who led the Transcendentalist movement of the mid-19th century . He was seen as a champion of individualism and critical thinking, as well as a prescient critic of the countervailing pressures of society and conformity . Friedrich Nietzsche thought he was "the most gifted of the Americans," and Walt Whitman called Emerson his "master". Emerson gradually moved away from his contemporaries' religious and social beliefs of his contemporaries, formulating and expressing the philosophy of Transcendentalism in his 1836 essay, " Nature ". Following this work, he gave a speech entitled " The American Scholar ," in 1837, which Oliver Wendell Holmes Sr. considered to be America's "intellectual Declaration of Independenc...