Barring any limiting event such as war or economic depression, if the pace at which Christians abandon their faith before the age of 30 were to accelerate beyond its current pace, America could no longer be a majority Christian nation in 23 years.

And Christians wouldn’t just lose their majority status in America in this scenario. They would also be outnumbered by the religiously unaffiliated, also known as “nones,” according to the findings of a new analysis by the Pew Research Center.

In the study, Pew highlights four hypothetical scenarios out of several possibilities to demonstrate how the U.S. religious landscape might change over the next half century. 

Of the four models presented, researchers selected the second which projects that rising disaffiliation from Christianity with limits could lead to “nones” becoming the largest religious identity in America by 2070 but not the majority identity.

The projected outcome for that model suggests that if the pace of disaffiliation before the age of 30 were to speed up initially but then hold steady, Christians would lose their majority status by 2050, when they would be 47% of the U.S. population compared to 42% for the unaffiliated. In 2070, “nones” would constitute a plurality of 48%, in this scenario while Christians would account for 39% of Americans.