Most violent conflicts since the turn of this century were in countries that had experienced an earlier violent conflict. How can we tell when a country is likely to remain stuck in a cycle of violence? What factors suggest it might be "ripe" for stabilizing and peace building? The authors studied four cases: Chad is stuck in a cycle of violence, while El Salvador, Laos, and Mozambique have had different results in their transitions from violence to stability to peace. Conflicts without internal cohesion of combatants or pressure from foreign patrons to stop fighting are probably not ripe for stabilizing. Where there are subnational or regional actors committed to violence, post-conflict peace building is not likely to succeed without enforcement capacity to contain violence or demonstrated commitments to increasing political inclusion and making material improvements in the lives of residents.

This annual volume includes papers from the 2015 CSIS Project on Nuclear Issues' Capstone Conference. Spanning a wide range of technical and policy issues, the papers further discussion in their respective areas and contribute to the training of the greater nuclear community.

Addressing an increasingly complex array of nuclear weapons challenges in the future will require talented young people with the necessary technical and policy expertise to contribute to sound decisionmaking on nuclear issues over time. To that end, the CSIS Project on Nuclear Issues (PONI) runs a yearly Nuclear Scholars Initiative for graduate students and young professionals. Those accepted into the program are hosted once per month at CSIS in Washington, DC, where they participate in daylong workshops with senior government officials and policy experts. Over the course of the six-month program, scholars are required to prepare a research paper. This volume is a collection of the 2014 papers from the Nuclear Scholars Initiative.

The Project on Nuclear Issues 2013 conference series included events at Northrop Grumman in May, Sandia National Laboratory in July, and CSIS in December, before concluding with a Capstone Conference at Offutt Air Force Base, home of the U.S. Strategic Command, in March 2014. The papers included in this volume are a collection of some of the presentations delivered at the Capstone Conference. Spanning a wide range of technical and policy issues, these selected papers hope to further discussion in their respective areas, as well as contribute to the success of the greater nuclear community.