Evangelical Christianity is Mexico's fastest-growing religious movement, with about ten million adherents today. Most belong to Protestant denominations introduced from the United States (e.g., Jehovah's Witnesses, Seventh-day Adventists), but perhaps as many as 800,000 are members of homegrown, "native" evangelical sects. These native Mexican sects share much with the American denominations of which they are spinoffs. For instance, they are Trinitarian, Anabaptist, and Millenarian; they emphasize a personal relationship with God, totally rejecting intermediation by saints; and they insist...