The holidays are always times for Americans to come together with their families. Anyone can summon archetypal images of a dining table with three generations—grandparents, parents, and children—together with siblings and the extended family they bring with them—cousins, aunts, and uncles. But family formation has been growing less common in America over time, and at some point in the last decade the number of American adults, aged eighteen to fifty-five, who are married with children, and the number of American adults who are single and childless, converged. Since 2010, the percentage of American adults who are married with children has continued to diminish, and the percentage of the single and childless—known as kinless—has grown. In 2023, demographers estimate that compared to only 32 percent of adults who are married with children, America now has a higher percentage, 38 percent, who are kinless.

This finding has vast social consequences for the country and its society, even for those Americans who are married and who do have children. It has consequences for families who not only have the 2.1 children each family must produce for the population to remain constant from generation to generation, but even and especially for those families who have considerably more than 2.1 children. Inevitably, the shared assumptions, convictions, cultural attitudes, and orientations toward tax policy, real estate, and government service of those with large families will drift farther and farther from those of the kinless.

The sociologist Brad Wilcox, author of the book Get Married: Why Americans Must Defy the Elites, Forge Strong Families, and Save Civilization, and the coauthor of a December article in Deseret, titled “Home Alone for the Holidays,” joins Mosaic’s editor Jonathan Silver to probe these consequences and explain how we got here.