The literature, both empirical and theoretical, regarding techniques of peaceful settlement in international conflict is notable primarily for its brevity. This is true of mediation as one principal method of conflict resolution. Those studies that are available tend to emphasize the diverse functions an intermediary can perform, resulting in a generally optimistic assessment of the utility of mediation. There has been an accompanying tendency to focus upon the qualities of a successful or ideal mediator. But an analysis of two cases of mediation suggests that: (1) the scope for effective mediation is much narrower than a list of the functions an intermediary can serve might indicate, and (2) the success or failure of mediation is largely determined by the nature of the dispute with the attributes and tactics of the mediator a marginal factor at best. Characteristics of a conflict which affect its susceptibility to mediation include: (1) the distribution of power among the protagonists, (2) the interests at stake, (3) the price of nonsettlement, and (4) personality factors.