Native American Church, Native American religious group whose beliefs blend fundamentalist Christian elements with pan–Native American moral principles. The movement began among the Kiowa about 1890 and, led by John Wilson (Big Moon), soon spread to other tribes. The sacramental food of the group was peyote, a hallucinogenic cactus, and the members came to be known as peyotists. In 1918, peyotists from a number of tribes incorporated their movement as the Native American Church. In 1940 the church was declared illegal by the Navajo Tribal Council, which saw it as a threat to Navajo culture and to Christianized Navajos. The church flourished underground, however, until 1967, when the tribe reversed its decision. By 1996, the church had 250,000 members in the United States, Mexico, and Canada.