(OPINION) Christianity has remained at the forefront of the nation’s political and social conversations for centuries — but new research shows that could be changing.

A new report by Pew Research Center and the General Social Survey published on Tuesday found that the large numbers of people in the U.S who practice Christianity are declining. The religion’s demographic has been dwindling since the 1990s, the report said, as many adults transition to an identity of atheist, agnostic or “nothing in particular.”

In the early ’90s, about 90% of people in the U.S. identified as Christians, the report said. In 2020, Christians accounted for about 64% of the U.S. population, including children. Meanwhile, those who are not affiliated with a religion has grown from 16% in 2007 to 30% in 2020, according to the research. All other religions, including Judaism, Islam, Hinduism and Buddhism, accounted for about 6% in 2020.


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Pew and GSS paired up to analyze how those numbers could change if the Christian decline accelerates or stops, and how other demographic trends, including migration and rates of birth and death, would influence the outcomes. The researchers only looked at religious identity, rather than religious beliefs and practices.

Four potential scenarios were considered: a stable rate of people moving in and out of Christianity; an increasing share of Christians leaving their religion as a decreasing number of people with no religious affiliation switching in; the same as the former but with no more than 50% of Christians switching their identity; and a scenario in which no person changes their religion.

“Depending on the future of religious switching, people who identify as atheist, agnostic or ‘nothing in particular’ could become America’s largest (non)religious group within our lifetime,” Pew researcher Stephanie Kramer tweeted.

In all of the scenarios, even if nobody switches their religious affiliation in the coming decades, the number of religiously unaffiliated people is hypothesized to approach or exceed the number of Christians by 2070, the report found.

None of the models considers Christianity numbers increasing, researchers said, as they are based on “dynamics currently shaping the religious landscape.” Dramatic events, such as armed conflicts, social movements, or rising authoritarianism could trigger social and religious upheavals, they added. (CBS News)