Most U.S. adults now say it is not necessary to believe in God to be moral and have good values, up from about half who expressed this view in 2011.
About a quarter of U.S. adults now say they think of themselves as spiritual but not religious, up 8 percentage points in five years.
Though the percentage of religiously "nones" in America has risen, the global share of religiously unaffiliated people is expected to fall in coming decades.
More babies were born to Christian mothers than to members of any other religion in recent years. Less than 20 years from now, however, the number of babies born to Muslims is expected to modestly exceed births to Christians.
While most Americans disapprove of Donald Trump’s recent refugee policy, there is a sizable divide on the issue among major religious groups.