Generational Replacement Fueling Rise in Atheism


Folksonomies: atheism cause and effect

Generational Replacement Behind Growth of Secularims

One important factor behind the growth of the religiously unaffiliated is generational replacement, the gradual supplanting of older generations by newer ones. Among the youngest Millennials (those ages 18-22, who were minors in 2007 and thus not eligible to be interviewed in Pew Research Center surveys conducted that year), fully one-third (34%) are religiously unaffiliated, compared with about one-in-ten members of the Silent Generation (9%) and one-in-twenty members of the World War II-era Greatest Generation (5%). Older Millennials (ages 23-30) also are substantially less likely than prior generations to be religiously affiliated.

But generational replacement is not the only factor at play. Generation Xers and Baby Boomers also have become more religiously unaffiliated in recent years. In 2012, 21% of Gen Xers and 15% of Baby Boomers describe themselves as religiously unaffiliated, up slightly (but by statistically significant margins) from 18% and 12%, respectively, since 2007. The trend lines for earlier generations are essentially flat. Not only are young adults less likely to be affiliated than their elders, but the GSS shows that the percentage of Americans who were raised without an affiliation has been rising gradually, from about 3% in the early 1970s to about 8% in the past decade. However, the overwhelming majority of the “nones” were brought up in a religious tradition. The new Pew Research Center/Religion & Ethics NewsWeekly survey finds that about three-quarters of unaffiliated adults were raised with some affiliation (74%).

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Folksonomies: secularism

Cause and Effect

Decline of US Religion Between 2007 and 2014

To be sure, the United States remains home to more Christians than any other country in the world, and a large majority of Americans – roughly seven-in-ten – continue to identify with some branch of the Christian faith.1 But the major new survey of more than 35,000 Americans by the Pew Research Center finds that the percentage of adults (ages 18 and older) who describe themselves as Christians has dropped by nearly eight percentage points in just seven years, from 78.4% in an equally massive Pew Research survey in 2007 to 70.6% in 2014. Over the same period, the percentage of Americans who are religiously unaffiliated – describing themselves as atheist, agnostic or “nothing in particular” – has jumped more than six points, from 16.1% to 22.8%. And the share of Americans who identify with non-Christian faiths also has inched up, rising 1.2 percentage points, from 4.7% in 2007 to 5.9% in 2014. Growth has been especially great among Muslims and Hindus, albeit from a very low base.

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Folksonomies: religion atheism demographics