Processes for Disarmament, Demobilization and Reintegration (DDR) are a fundamental component in peacebuilding. While disarmament can be relatively straightforward, reintegration is more complex and has varying degrees of success. Economic factors tend to be the focus, neglecting social reintegration in its fullest sense. This article draws on two sets of related field research data (collected in 2007, 2010 and 2011) in Liberia to highlight the role of social capital in shaping DDR outcomes. This is an important factor in the reintegration of ex-combatants, in terms of establishing and testing norms, engaging social networks, and building relationships and trust. These components of social capital are directly influenced by the reintegration experience, and in turn have a significant role in translating reintegration into peacebuilding. In addition, building on pre-existing social structures such as family connections, religious or community groups, and trading networks can in fact contribute to successful reintegration. When DDR initiatives fail, these structures are often the only way an ex-combatant has of reintegrating.