Abstract: | Previous quantitative research on mediation in intrastate and interstate conflicts has highlighted the role of external mediators. This study represents the first effort to systematically explore the role of internal—insider-partial—mediators. We suggest that the insider-partial mediators bring important indigenous resources to a peace process and that they can complement external mediators by mitigating the bargaining problem of information failure. Exploring new data on the occurrence and effect of mediation in unarmed insurrections from 1970–2006, we find that the insider-partial mediators significantly increase the likelihood of negotiated agreements. This applies even after controlling for so-called selection effects, where external mediators are selected, or self-selected, into the most difficult conflict situations, whereas insider-partial mediators are utilized in conflict situations that are less severe; and where insider-partial mediators have a substantially higher frequency of activity in unarmed as compared to armed insurrections. We therefore conclude that the insider-partial mediators play an important and positive role in peacemaking that merits further exploration. |