Trend-watchers might want to take note of this report, from USA TODAY:

Americans who don’t identify with any religion are now 15% of the USA, but trends in a new study shows they could one day surpass the nation’s largest denominations — including Catholics, now 24% of the nation.

“American Nones: Profile of the No Religion Population,” to be released today by Trinity College, finds this faith-free group already includes nearly 19% of U.S. men and 12% of women. Of these, 35% say they were Catholic at age 12.

“Will a day come when the Nones are on top? We can’t predict for sure,” says lead researcher Barry Kosmin.

But if Nones, now 22% of all adults ages 18 to 29, continue to gain among young adults, to draw more people “switching out” from denominations and to replace more religious older people, researchers forecast one in five Americans will be Nones in 20 years.

“Trends clearly favor this,” Kosmin says. But he also notes, “There could be a Great Awakening (massive Protestant revival) or immigration may bring in more Catholic believers.”

Kosmin and Ariela Keysar of Trinity College, Hartford, Conn., directed three editions of the American Religious Identification Survey over 18 years. The 2008 ARIS, based on a sampling of 54,000 U.S. adults, also burrowed in for a closer look at 1,106 Nones, who answered extra questions about their beliefs and behaviors and views on God.

The report finds:

•Not all Nones are alike. Half (51%) still believe in God or a higher power.

•Nones also are the only major U. S. faith group that’s majority male. Even when girls grow up with unbelieving parents, they’re more likely to find a faith as adults than their brothers.

“Women are also less skeptical than men and less drawn to irreligious and anti-religious views. They are more likely to reject a secular upbringing,” Kosmin says.

“There is a lot of ‘churning’ going on but Nones gain much more from switching (people leaving religion) than from natural growth (children emulating unbelieving parents),” he says.

•The percentage of atheist Nones — who say there’s no such thing as God — hasn’t budged in years.

“It’s not as though dozens of people at the Methodist Church read (atheist Richard) Dawkins and suddenly decided God doesn’t exist,” says Kosmin.

“There are so many misconceptions about who the Nones are. They’re not New Age searchers or spiritual or even hardened atheists,” says Kosmin.

“They’re a stew of agnostics, deists and rationalists. They sound more like Thomas Jefferson and Tom Payne. Their very interesting enlightenment approach is like the Founding Fathers’ kind: Skeptical about organized religion and clerics while still holding to an idea of God.”

Continue at the link for the rest.