This chapter demonstrates the ways in which harsh economic forces have undermined the stability of American families. The fragile families that the 1965 Moynihan Report identified as a phenomenon limited to poor, urban African American families in the next two decades spread to the underclass of all races as economic inequality and insecurity expanded in the United States. Since then, as economic restructuring has increasingly decimated the job opportunities of the working class, their families too have become destabilized. The end result is that marriage rates have plummeted among poor and working-class families, while rates of divorce and nonmarital births have skyrocketed. American families are now the most unstable in the world, at considerable cost to the well-being of adults and, particularly, children. While some commentators, including J. D. Vance, have argued that the problems of the poor and working class derive from cultural rather than economic sources, clear analysis shows the roots of these problems are firmly planted in the economic domain.