One of most important but little known concepts of Western occultism is that of the Egregore, an autonomous psychic entity created by a collective group mind. An Egregore is sustained by belief, ritual, and sacrifice and relies upon the devotion of a group of people, from a small coven to an entire nation, for its existence. An Egregore that receives enough sustenance can take on a life of its own, becoming an independent deity with powers its believers can use to further their own spiritual advancement and material desires. In this first book devoted to the study of Egregores, Mark Stavish examines their history from ancient times to present day, with detailed and documented examples, provides instructions on how to identify Egregores, free yourself from a parasitic and destructive collective entity, and destroy an Egregore, should the need arise.