Marriage and Child Wellbeing Revisited: Introducing the Issue

Many unmarried parents are cohabiting when their child is born. Indeed, almost all of the increase in nonmarital childbearing during the past two decades has occurred to cohabiting rather than single mothers.1 But cohabiting unions are very unstable, leading us to use the term “fragile families” to describe them. About half of couples who are cohabiting at their child’s birth will split by the time the child is five. Many of these young parents will go on to form new relationships and to have additional children with new partners. The consequences of this instability for children are not good. Research increasingly shows that family instability undermines parents’ investments in their children, affecting the children’s cognitive and social-emotional development in ways that constrain their life chances.2