Around six-in-ten U.S. atheists are men (64%). And seven-in-ten are ages 49 or younger, compared with about half of U.S. adults overall (52%).

28% of U.S. adults are religiously unaffiliated, describing themselves as atheists, agnostics or “nothing in particular” when asked about their religion.

Most Americans are spiritual or religious in some way and many also say their spirituality and level of religiosity have changed over time.

Overall, 70% of U.S. adults describe themselves as spiritual in some way, including 22% who are spiritual but not religious. An overwhelming majority of U.S. adults (83%) say they believe that people have a soul or spirit in addition to their physical body. And 81% say there is something spiritual beyond the natural world, even if we cannot see it.

A rising share of Asian Americans say they have no religion (32%), but many consider themselves close to one or more religious traditions for reasons such as family or culture. Christianity is still the largest faith group among Asian Americans (34%).

Read about some of the ways focus group participants with ties to different faith traditions explain the complex relationship of religion and culture in their lives.

Despite the Chinese Communist Party's ban on religion, some 6% of party members formally identify with a religion.

Based on formal religious identity, China is the least religious country in the world - with just 10% of Chinese adults self-identifying with a religion.

Only one-in-ten Chinese adults formally identify with a religion, but surveys indicate that religion plays a much bigger role in China when the definition is widened to include questions on spirituality, customs and traditional beliefs.

17% of U.S. adults have unfollowed, unfriended, blocked or changed their settings to see less of someone on social media because of religious content the person posted or shared.