Concern is growing about the damage that instability can do to children's healthy development. However it has emerged separately across different domains, with little focus on the pervasive and interconnected nature of the issue or on possible cross-cutting policy solutions. This report presents the insights gleaned from a November 2013 convening of policymakers, practitioners, and researchers about the implications of stability and instability for children's development, as well as what we know, what we need to learn, and what we need to do across research, policy, and practice. A companion report includes essays from some of the meeting participants.