Diverse interests facilitate conflict mediation in international crises

We investigate the effect of ethnic pluralism on mediation in interstate and internationalized civil crises from 1945 to 2010. We find that mediation succeeds when two conditions are met. First, success is more likely when there are fewer disenfranchised ethnic groups in the disputant population, because these groups are usually excluded from peace talks and often use violence to challenge peace. Second, mediators are more likely to succeed when politically included disputants, usually present at peace talks, comprise various different ethnic groups. Because such groups, numerous as they are, pull and tug for dominance at peace negotiations, they are unable to form decisive coalitions. As a result, third parties have a chance to serve in a more authoritative role and influence a settlement