Shamanism is a belief that there is an unseen spirit world and that special healers can interact with it.
In shamanism, practitioners called shamans enter deep trance states in which they communicate with the spirits of ancestors, gods, and demons. The energy from these spiritual connections is used both for healing rituals and to divine the future. The tradition of shamanism goes back to Indigenous residents of Siberia, and the word shamanism derives from the Tungusic šaman, "one who knows."