This article presents and assesses the state of the art in research on
the course and outcomes of international mediation. The review consis
ts of three parts. First, the elusive notion of mediation success is a
ddressed. Second, the key contextual and process factors thought to ex
plain international mediation outcomes are discussed. The final part r
aises a number of problems with current theorizing, and a plea is made
For a more fundamental reflection on the assumptions underlying prese
nt research. Using a heuristic adaptation of the metatheoretical frame
work developed by Burrell and Morgan, it is argued that four fundament
ally different currents of thought about international conflict and it
s management may be discerned. These four proto-theories may help us t
o put into perspective current debates and contradictory findings, as
well as generate a more coherent foundation for future research on the
success and failure of mediation in international conflict.