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. Stimulated by English and German Romanticism, the Biblical criticism of Herder and Schleiermacher, and the skepticism of Hume, the transcendentalists operated with the sense that a new era was at hand. They were critics of their contemporary society for its unthinking conformity, and urged that each person find, in Emerson’s words, “an original relation to the universe” (O, 3). Emerson and Thoreau sought this relation in solitude amidst nature, and in their writing. By the 1840s they, along with other transcendentalists, were engaged in the social experiments of Brook Farm, Fruitlands, and Walden; and, by the 1850s in an increasingly urgent critique of American slavery.
Stanford Encyclopedia of Philosophy
The term ‘pantheism’ is a modern one, possibly first appearing in the writing of the Irish freethinker John Tolland (1705) and constructed from the Greek roots pan (all) and theos (God). But if not the name, the ideas themselves are very ancient, and any survey of the history of philosophy will uncover numerous pantheist or pantheistically inclined thinkers; although it should also be noted that in many cases all that history has preserved for us are second-hand reportings of attributed doctrines, any reconstruction of which is too conjectural to provide much by way of philosophical illumination.
At its most general, pantheism may be understood positively as the view that God is identical with the cosmos, the view that there exists nothing which is outside of God, or else negatively as the rejection of any view that considers God as distinct from the universe.
However, given the complex and contested nature of concepts involved, there is insufficient consensus among philosophers to permit the construction of any more detailed definition not open to serious objection from some quarter or other. Moreover, the label is a controversial one, where strong desires either to appropriate or to reject it often serve only to obscure the actual issues, and it would be a sad irony if pantheism revealed itself to be most like a traditional religion in its sectarian disputes over just what counts as ‘true pantheism.’ Therefore pantheism should not be thought of as a single codifiable position. Rather it should be understood as a diverse family of distinct doctrines; many of whom would be surprised — and, indeed, disconcerted — to find themselves regarded as members of a single household. Further, since the concept has porous and disputed boundaries there is no clear consensus on just who qualifies, no definities roll-call of past pantheists. Given this situation the range qualifies, no definitive roll-call of past pantheists. Given this situation the range of things that may be usefully said about all pantheisms is perhaps limited, but nonetheless a variety of concepts may be clarified, the nature of contentious issues explored, and the range of possible options more precisely mapped out.
Stanford Encyclopedia of Philosophy