Patrick Johnstone authored Operation World, "the definitive prayer guide to every nation." The resource has sold more than 2.5 million copies and is considered by many to be the most important missions resource in history. Johnstone, a former missionary, recently took on another writing project of equally impressive scope: The Future of the Global Church (IVP, 2012). The book includes data on global history, demographics, and religion.
What are some surprising developments in Christianity globally?
The 1990s was the greatest harvest into the kingdom of God that the world has ever seen. Part of this is due to trends in demographics. The places where Christian faith has flourished have also been the places with the greatest population growth. Evangelical Christians went through a wilderness period from the 1920s until the 1960s. But now evangelicals are a leading expression of Christianity. I recently spoke at an Anglican clergy conference and said, "Do you realize that the Anglican Communion in 2050, if present trends continue, will be 84 percent African and almost entirely evangelical?" Arguments about homosexuality, women's ministry, and other current hot issues in Anglicanism will hardly be relevant in 2050.
In the 20th century many assumed Christian faith would decline. What's actually happening?
The former Communist, European, and Pacific countries are secularizing very rapidly. Canada is somewhere in between the U.S. and Europe. Meanwhile Christian faith in the U.S. is in gentle decline. But growth in what I call "AFASLA"—Africa, Asia, Latin America—more than compensates for the losses in the West.
Nonreligious people are committing sociocide, mainly because of their low birthrates. There are a handful of prominent atheists making noise in the public square, but nonreligious groups peaked in the 1970s and have declined ever since.