The share of Americans who do not identify with a religious group is surely growing, but there are differing ideas about the factors driving this trend.
The U.S. religious landscape is already in the midst of some dramatic changes when it comes to the growth or decline of people with certain religious identities. And while it is impossible to predict exactly how that landscape will shift in the future, some key demographic factors โ particularly age โ can provide a clue as to how things might unfold in the coming decades.
Jehovahโs Witnesses, who make up just less than 1% of U.S. adults, are known for their door-to-door proselytism. But members of this denomination, which has its origins in 19th-century America, are also unique in many other ways.
Israeli Druze make up roughly 2% of the countryโs population and live mostly in the northern regions of the Galilee, Carmel and the Golan Heights. Their tradition dates back to the 11th century and incorporates elements of Islam, Hinduism and even classical Greek philosophy.
Pew Research Center estimates that there were about 3.3 million Muslims of all ages living in the United States in 2015. This means that Muslims made up about 1% of the total U.S. population.