Even more remarkable is that the religious revival is occurring in places that are rapidly modernizing. China and India today have the fastest growth rates in the world, and religion is thriving in both places. Turkey is the one of the most modern of the Muslim countries, and Islam has steadily gained strength there. In Central and South America, the upwardly mobile classes are embracing Pentecostal Christianity.

The global spread of American culture, with the secular values it carries, seems not to have arrested or even slowed the religious upsurge. The reason is that many non- Western cultures are actively resisting secularism. A common slogan in Asia today is “modernization without Westernization.” Many people want American prosperity and American technology, but they want to use these to preserve and strengthen their traditional way of life. They want to live in a world of multiple modernities.

We often read that Islam is the fastest-growing religion. Not true. Christianity is the fastest-growing religion in the world today. Islam is second. While Islam grows mainly through reproduction—which is to say by Muslims having large families—Christianity spreads through rapid conversion as well as natural increase. Islam has become the fastest-growing religion in Europe, which for more than a thousand years has been the home of Christianity. Catholic writer Hilaire Belloc wrote in 1920 that “the faith is Europe and Europe is the faith:’ Belloc was convinced that the future of Christianity lay in Europe.

Ironically, while Europe has moved away from Christianity, the Christian religion has been expanding its influence in Central and South America, in Africa, and in Asia. For the first time in history, Christianity has become a universal religion. It is in fact the only religion with a global reach. Buddhism and Islam, like Christianity, are religions with global aspirations, but these aspirations have not been realized. Buddhism never established itself even in the land of its founding, India, although it found adherents in the cultures of Southern and Eastern Asia. Even though it has a few followers in the West, Buddhism remains a religion with, at best, a regional impact. Islam is vastly stronger, buteven Islam is regional, with little or no sway in the United States, Canada, Central and South America, or Australia. By contrast, Christianity is a force on every continent and in every major region of the world, with the sole exception of the heartland of Islam, the Middle East.

The new face of Christianity is no longer white and blond but yellow, black, and brown. “If we want to visualize a typical contemporary Christian,” Philip Jenkins writes in The Next Christendom, “we should think of a woman living in a village in Nigeria or in a Brazilian favela.” The vital centers of Christianity today are no longer Geneva, Rome, Paris, or London. They are Buenos Aires, Manila, Kinshasa, and Addis Ababa. “The era of Western Christianity has passed within our lifetimes,” Jenkins observes, “and the day of Southern Christianity is dawning.”

In 1900, more than 80 percent of Christians lived in Europe and America. Today 60 percent live in the developing world. More than two out of three evangelical Christians now live in Asia, Africa, and South America. Here are some numbers Jenkins provides: Europe today has 560 million Christians and America has 260 million, yet many of these are Christian in name only. In comparison, there are 480 million Christians in South America, 313 million in Asia, and 360 million in Africa. The vast majority of these are practicing Christians. There are more churchgoing Presbyterians in Ghana than in Scotland.