Demographer Conrad Hackett explains how he and his team put together our major new report and why it differs from past efforts to predict religious change.
Half of the world’s population lives in just six countries. But in many cases, the world’s major religious groups are even more concentrated.
The Yazidis who have been fleeing the advance of the Sunni militant group ISIS in Iraq are a religious group of uncertain numbers and a long history of persecution.
Pope Francis is scheduled to visit Jordan, the West Bank and Israel this weekend, a region where the Christian population is in flux and where Francis has expressed concern about their well-being.
How much do you know about the world’s Christian population? Which country has the largest Catholic population, and which has the largest number of Protestants? W have a short, ten-question quiz on the global Christian population to test your knowledge.
The pope’s popularity hasn't yet produced a Catholic resurgence in the U.S. in terms of the share of Americans who identify as Catholic, or the share of those who report attending Mass weekly.
Senior research staff answer questions from readers relating to all the areas covered by our seven projects, ranging from polling techniques and findings, to media, technology, religious, demographic and global attitudes trends.