When did faith start to fade?

Adam Gopnik in The New Yorker:

In Tom Stoppard’s 1970 play “Jumpers,” the philosopher hero broods unhappily on the inexorable rise of the atheist: “The tide is running his way, and it is a tide which has turned only once in human history. . . . There is presumably a calendar date—a moment—when the onus of proof passed from the atheist to the believer, when, quite suddenly, the noes had it.” Well, when was that date—when did the noes have it? In 1890? In 1918, after the Great War? In 1966, when Time shocked its readers with a cover that asked whether God was dead? For that matter, do the noes have it? In most of the world, the ayes seem to be doing just fine. Even in secularized Manhattan, the Christmas Eve midnight Mass is packed tight with parishioners, and the few who came for the music are given dirty looks as they sheepishly back out after the Vivaldi.

The most generous poll never seems to find more than thirty per cent of Americans saying they are “not religious or not very religious,” though the numbers get up to around fifty per cent in Europe. But something has altered in the course of a century or so. John Stuart Mill said in the early nineteenth century that he was the only youth he knew who was raised as a skeptic; by the end of his life, skeptics were all around him. Yet, though the nineteenth-century novel is roiled by doubt, there isn’t one in which the doubters quite dominate. Whatever change has occurred isn’t always well captured by counting hands. At a minimum, more people can say they don’t think there is a God, and suffer less for saying so, than has been the case since the fall of Rome. The noes have certainly captured some constituency, obtained some place. What, exactly, do they have?

More here.