Comprising over 700 denominations and many independent churches, Pentecostalism is highly decentralized. No central authority exists, but many denominations are affiliated with the Pentecostal World Fellowship. With over 279 million classical Pentecostals worldwide, the movement is growing in many parts of the world, especially the global South. Since the 1960s, Pentecostalism has increasingly gained acceptance from other Christian traditions, and Pentecostal beliefs concerning Spirit baptism and spiritual gifts have been embraced by non-Pentecostal Christians in Protestant and Catholic churches through the Charismatic Movement. Together, Pentecostal and Charismatic Christianity numbers over 500 million adherents. While the movement originally attracted mostly lower classes in the global South, there is an increasing appeal to middle classes. Middle class congregations tend to be more adapted to society and withdraw strong spiritual practices such as divine healing.