Emerging from the Americas and now appearing in Europe, the Philippines, Nigeria and South Africa, today’s narco-evangelists share an increasingly popular strand of Christianity: Pentecostalism. It’s the fastest-growing religion in the world, already with around 650 million followers. A branch of evangelical Protestantism, in recent decades Pentecostalism has become the faith of the world’s poor. In large part, this is because of its particular focus on the Holy Spirit’s role in health and wealth, but there is also the significant lure of the faith’s deep authenticity, rooted in local cultures. Much of this is due to the fact that there is little in the way of authority structures and pastoral oversight. Not only is there no Pentecostal pope, but all you really need to be a preacher is followers.