"Young people today are not only more religiously unaffiliated than their elders; they are also more religiously unaffiliated than previous generations of young people ever have been as far back as we can tell. This really is something new."

Greg Smith, senior researcher at the Pew Forum on Religion & Public Life, on new data that shows one-in-five Americans say they do not identify with any religion.

Hear the full NPR interview here