Read about where Christianity has had the largest net losses, and how those who've left Christianity now identify religiously ...

A new study has found that in many countries around the world 20 percent or more of all adults have left their childhood ...

Global study finds Christian decline, especially in high-income countries. Around the world, millions of people have traded the religious traditions of their upbringing for no religion at all.

The countries have a variety of historically predominant religions, including Buddhism, Christianity, Hinduism, Islam and Judaism. For non-U.S. data, this analysis draws on nationally representative ...

The Christian population was shrinking, on its way to becoming a minority religion. America may have been some years behind Europe in the process, but its pews were emptying steadily and inexorably.