Nearly all Pentecostal denominations trace their origins to the Azusa Street Revival, in Los Angeles (1906–10). In 1914 several small Pentecostal groups in Hot Springs, Arkansas, formed the intensely mission-conscious Assemblies of God, which combined foreign missions with domestic outreach amongst urban populations, on Indian reservations and in prisons. They developed Spanish-language branches, and autonomous denominations appeared in Mexico and Puerto Rico. It is believed that they are the largest Pentecostal denomination worldwide, with more than 25 million members and missions in over 150 countries. During the 1960s, a “charismatic renewal” brought phenomena like Pentecostalism to many of the old mainline Protestant churches. From 1967, the Roman Catholic hierarchy warily accepted a charismatic movement within the church, which is made particular progress in Latin America. Many independent and non-denominational churches springing up in Africa, East Asia and elsewhere in the 1980s adopted certain renewalist characteristics. By the early 21st century over a quarter of all Christians worldwide belonged to some part of this tradition, especially in Africa and Latin America.
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