The spirit world, a domain inhabited by spirits according to spiritualist traditions, is conceptualized as an external environment where consciousness continues beyond physical death, interacting with the material world through mediumship and trance. Authors like Benjamin Fiske Barrett questioned whether humans would enter this domain as conscious, intelligent spirits, while Evelyn Underhill described it as a co-eternal dimension of the Absolute, inseparable from the soul’s expression.
Spiritualists, influenced by Emanuel Swedenborg, envisioned structured "spheres" governed by divine laws, blending hierarchical order with infinite expansiveness. This theme underscores the spirit world as both a theological construct and a transformative experience, bridging earthly existence with a realm of truth and spiritual purpose.