A fascinating exposé of the global revolution you've never heard of: a deep-pocketed, tech-savvy Christian movement reshaping our societies from within. How has a Christian movement, founded at the turn of the twentieth century by the son of freed slaves, become the fastest-growing religion on Earth? Pentecostalism has 600 million followers; by 2050, they'll be one in ten people worldwide. This is the religion of the Holy Spirit, with believers directly experiencing God and His blessings: success for the mind, body, spirit and wallet. Pentecostalism is a social movement. It serves impoverished people in Africa and Latin America, and inspires anti-establishment leaders from Trump to Bolsonaro. In Australia, Europe and Korea, it throws itself into culture wars and social media, offering meaning and community to the rootless and marginalised in a fragmenting world.