The world's departure from organized religion

There's a global, fast-growing population of people without a religion. That's according to a new AP-NORC Poll.

Why it matters: Religion has long been a powerful force in society, touching politics, art and daily life. The rise of nonbelievers and people with no religious affiliation is diminishing its influence.

By the numbers: 3 in 10 U.S. adults said they had no religious affiliation.

About half of them identify as atheist or agnostic, and the other half say their religion is "nothing in particular."

The shift away from religion is even starker among younger adults, with 43% of 18- to 29-year-old Americans responding "none," when asked which religion they follow.