Given that “Nature” is historically imbricated in the history of Christianity, the secularizing movement of modernity puts nature under intense pressure. The resulting conflicts are modeled by the United States, which authorized political revolution by invoking “the laws of Nature and of Nature’s God.” The American Transcendentalists extended nature as divine order and transcendent arbiter to authorize intellectual revolution, consolidating liberal Protestantism, European Romanticism, and modern science into a template for the meaning of nature in modernity; humans became not humble creatures in God’s creation but God’s avatars commanding all merely material beings. Today, as the resulting ecological collapse destabilizes inherited concepts of nature, “ecology” is offered as a replacement, even though ecology as a science cannot offer moral value or spiritual meaning. This intellectual history is traced through the founding work of Ralph Waldo Emerson, who offered idealism as the engine of modernity, and three followers, Orestes Brownson, Henry David Thoreau, and Margaret Fuller, who variously pluralized nature into the plenitude of material forms and beings seen as vulnerable incarnations of a higher or divine life force, prefiguring the science and ethics of ecology as an aspect of, rather than replacement for, nature.