Transcendentalism is a philosophical movement that developed in the late 1820s and 1830s in the eastern United States. It arose as a reaction to or protest against the general state of intellectualism and spirituality at the time. The doctrine of the Unitarian church as taught at Harvard Divinity School was of particular interest.
Transcendentalism emerged from English and German Romanticism, the Biblical criticism of Johann Gottfried Herder and Friedrich Schleiermacher, the skepticism of David Hume, and the transcendental philosophy of Immanuel Kant and German Idealism. Miller and Versluis regard Emanuel Swedenborg as a pervasive influence on transcendentalism. It was also influenced by Hindu texts on philosophy of the mind and spirituality, especially the Upanishads.
A core belief of transcendentalism is in the inherent goodness of people and nature. Adherents believe that society and its institutions have corrupted the purity of the individual, and they have faith that people are at their best when truly "self-reliant" and independent.
Transcendentalism emphasizes subjective intuition over objective empiricism. Adherents believe that individuals are capable of generating completely original insights with as little attention and deference to past masters as possible.
Transcendentalism is closely related to Unitarianism, the dominant religious movement in Boston in the early nineteenth century. It started to develop after Unitarianism took hold at Harvard University, following the elections of Henry Ware Sr. as the Hollis Professor of Divinity in 1805 and of John Thorton Kirkland as President in 1810. Transcendentalism was not a rejection of Unitarianism; rather, it developed as an organic consequence of the Unitarian emphasis on free conscience and the value of intellectual reason. The transcendentalists were not content with the sobriety, mildness, and calm rationalism of Unitarianism. Instead, they longed for a more intense spiritual experience. Thus, transcendentalism was not born as a counter-movement to Unitarianism, but as a parallel movement to the very ideas introduced by the Unitarians.