Muslims are the fastest-growing faith group, followed by the religiously unaffiliated, according to a new Pew Research Center study measuring the evolution of the global religious population between ...

Muslims are the fastest-growing faith group, followed by the religiously unaffiliated, according to a new Pew Research Center study measuring the evolution of the global religious population between ...

A Muslim pilgrim reads a copy of the Quran at the Grand Mosque during the annual Hajj pilgrimage in Mecca, Saudi Arabia. Muslims are the fastest-growing faith group, followed by the religiously ...