Christian scholar Mary Eberstadt has a new book entitled How the West Really Lost God: A New Theory of Secularization. From the editorial description at Amazon:
In this magisterial work, leading cultural critic Mary Eberstadt delivers a powerful new theory about the decline of religion in the Western world. The conventional wisdom is that the West first experienced religious decline, followed by the decline of the family. Eberstadt turns this standard account on its head. Marshalling an impressive array of research, from fascinating historical data on family decline in pre-Revolutionary France to contemporary popular culture both in the United States and Europe, Eberstadt shows that the reverse has also been true: the undermining of the family has further undermined Christianity itself. . . .
Her conclusion considers this tantalizing question: whether the economic and demographic crisis now roiling Europe and spreading to America will have the inadvertent result of reviving the family as the most viable alternative to the failed welfare state—fallout that could also lay the groundwork for a religious revival as well.