Occultism took institutional shape in Europe in 1875, with the foundation of the Theosophical Society by Helena Petrovna Blavatsky and Henry Steel Olcott (Theosophy). At the same time, it developed as a theoretical system opposed to contemporary materialism and directed against the established churches, and closely associated with 19th-century esoterica. The essence of this theory was the assumption of immaterial, supra-sensory forces arising from a “fluid,” “astral light,” or “animal soul” that perva…