The study of civil society participation in peace negotiations has become increasingly popular. Although research has stressed the importance of coordination among civil society groups, no study has so far been conducted that studies the impact coordination among civil society groups can have on the quality of a peace agreement. This thesis aims to fill this gap by asking How does the extent of coordination among civil society groups during peace negotiations impact the quality of a peace agreement? Springing from the premise that civil society groups are aware of underlying conflict causes, this thesis argues that a high extent of civil society groups’ coordination leads to a highquality peace agreement and that this is particularly so when a civil society actor is facilitating the coordination. By applying the method of structured focused comparison, these hypotheses are tested on Guatemala, El Salvador, and Liberia. The empirical findings do not show support for the hypotheses. A variety of factors were discovered during the analysis that could have hampered the impact of civil society groups’ coordination or could hold alternative explanatory power and thus stress the need for further research.