Here’s an interesting quote from a recent article in the Weekly Standard:
How did we get to an America where half of the adult population isn’t married and somewhere between 10 percent and 15 percent of the population don’t get married for the first time until they’re approaching retirement? It’s a complicated story involving, among other factors, the rise of almost-universal higher education, the delay of marriage, urbanization, the invention of no-fault divorce, the legitimization of cohabitation, the increasing cost of raising children, and the creation of a government entitlement system to do for the elderly childless what grown children did for their parents through the millennia.
But all of these causes are particular. Looming beneath them are two deep shifts. The first is the waning of religion in American life. As Joel Kotkin notes in a recent report titled “The Rise of Post-Familialism,” one of the commonalities between all of the major world religions is that they elevate family and kinship to a central place in human existence. Secularism tends toward agnosticism about the family. This distinction has real-world consequences. Take any cohort of Americans—by race, income, education—and then sort them by religious belief. The more devout they are, the higher their rates of marriage and the more children they have.