Anima mundi is a Platonic concept developed in the Timaeus, where Plato describes the
Demiurge creating a World Soul as the animating principle of the
cosmos. The concept was enormously influential in Neoplatonism,
Renaissance natural philosophy, and Romanticism, providing the philosophical framework for
the idea that
nature is alive, responsive, and spiritually connected to the human soul. Students should distinguish anima mundi from the related but distinct concepts of pantheism (God is everything), panentheism (God contains everything), and animism (all things have spirits). In the context of W.B.
Yeats's system in A Vision, anima mundi functions as a collective spiritual memory accessible to the poet through inspiration. Related terms include spiritus mundi (
the spirit of the world, Yeats's term), the
Oversoul (
Emerson), and the Romantic concept of nature as
a living presence.