Shamanism ( /ˈʃɑːmən/ SHAH-mən or /ˈʃeɪmən/ SHAY-mən) is a term used in a variety of anthropological, historical and popular contexts to refer to certain magico-religious practices that involve a practitioner reaching altered states of consciousness in order to encounter and interact with the spirit world. A shaman is a person regarded as having access to, and influence in, the world of benevolent and malevolent spirits, who typically enters a trance state during a ritual, and practices divination and healing. The exact definition and use of the term "shamanism" has been highly debated by scholars, with no clear consensus on the issue.

The term "shamanism" originates from the Tungusic languages of eastern Siberia, and was originally used by western scholars to describe the practices of certain types of magico-religious specialist within Central and Northern Asia. Upon learning more about religious traditions across the world, western scholars also used the term "shamanism" in reference to similar magico-religious practices found within the indigenous religions of other parts of Asia, Africa, Australasia and the Americas. Various historians have argued that shamanism also played a role in many of the pre-Christian religions of Europe, and that shamanistic elements may have survived in popular culture right through to the Early Modern period. Various archaeologists and historians of religion have also suggested that shamanism may have been a dominant religious practice for humanity during the Palaeolithic.

Terence Kemp McKenna (November 16, 1946 – April 3, 2000) was an American philosopher, psychonaut, researcher, teacher, lecturer and writer on many subjects, such as human consciousness, language, psychedelic drugs, the evolution of civilizations, the origin and end of the universe, alchemy, and extraterrestrial beings.

Terence McKenna grew up in Paonia, Colorado. He was introduced to geology through his uncle and developed a hobby of solitary fossil hunting in the arroyos near his home. From this he developed a deep artistic and scientific appreciation of nature.

At age 16, McKenna moved to Los Altos, California to live with family friends for a year. He finished high school in Lancaster, CA. In 1963, McKenna was introduced to the literary world of psychedelics through The Doors of Perception and Heaven and Hell by Aldous Huxley and certain issues of The Village Voice that talked about psychedelics.

McKenna claimed that one of his early psychedelic experiences with morning glory seeds showed him "that there was something there worth pursuing." In an audio interview Terence Mckenna claims to have started smoking cannabis regularly during the summer following his 17th birthday.

Sandra Ingerman is a psychotherapist and shamanic practitioner who teaches workshops on shamanism. She has taught with Michael Harner, and was the Educational Director for the Foundation for Shamanic Studies, where she served on the Board of Trustees. Currently she serves on the Board of Directors of the Society for Shamanic Practitioners

Ingerman received her M.A. in counseling psychology from the California Institute of Integral Studies and is a licensed therapist and counselor in the state of New Mexico. She is a board certified expert on traumatic stress and certified in acute traumatic stress management. She has written books books including Soul Retrieval, Welcome Home, Shamanic Journeying and How to Heal Toxic Thoughts.

Soul Retrieval is a shamanic practice, popularized by Ingerman, which involves journeying to the spirit world to retrieve parts of the client's soul that have been lost as a result of trauma experienced earlier in life.

Alan Oswald Moore (born 18 November 1953) is an English writer primarily known for his work in comic books, a medium where he has produced a number of critically acclaimed and popular series, including Watchmen, V for Vendetta, and From Hell. Frequently described as the best graphic novel writer in history, he has also been described as "one of the most important British writers of the last fifty years". He has occasionally used such pseudonyms as Curt Vile, Jill de Ray, and Translucia Baboon.

Moore started out writing for British underground and alternative fanzines in the late 1970s before achieving success publishing comic strips in such magazines as 2000 AD and Warrior. He was subsequently picked up by the American DC Comics, and as "the first comics writer living in Britain to do prominent work in America", he worked on big name characters such as Batman (Batman: The Killing Joke) and Superman (Whatever Happened to the Man of Tomorrow?), substantially developed the minor character Swamp Thing, and penned original titles such as Watchmen. During that decade, Moore helped to bring about greater social respectability for the medium in the United States and United Kingdom, and has subsequently been credited with the development of the term "graphic novel" over "comic book". In the late 1980s and early 1990s he left the comic industry mainstream and went independent for a while, working on experimental work such as the epic From Hell, pornographic Lost Girls, and the prose novel Voice of the Fire. He subsequently returned to the mainstream later in the 1990s, working for Image Comics, before developing America's Best Comics, an imprint through which he published works such as The League of Extraordinary Gentlemen and the occult-based Promethea.