Read about it here.
Read to the end, where Peter Berger is quoted:
"Abrams, Wiener and Yaple are not the first to predict the end of religion. Peter Berger, a former president of the Society for the Scientific Study of Religion, once said that, "People will become so bored with what religious groups have to offer that they will look elsewhere." He said Protestantism "has reached the strange state of self-liquidation," that Catholicism was in severe crisis, and anticipated that "religions are likely to survive in small enclaves and pockets" in the United States.
He made those predictions in February 1968."
Cmp. Harvey Cox's similar prediction in his book The Secular City. (Now selling for 72 cents on amazon.com.) Cox recanted here.