Bori is a pre-Islamic animist traditional religion of the Hausa people of West Africa (present-day Northern Nigeria) that involves magic and spirit possession. While only a part of the Hausa people (mostly urbanites) converted to Islam before the end of the 18th century, most of the adherents of Hausa followed their lead in the wake of a jihad begun by Islamic reformer Usman dan Fodio about 1800 CE and extending to the middle of the 20th century. A small minority of Hausa converted to Christianity. Adherents are nonexistent here at the beginning of the 21st century, but since Hausa animism and Islam coexisted for centuries, some traditions related to animism continue to be practiced locally.