This study examines the relationship between economic interdependence and international conflict. Two schools of thought exist on this issue: some prominent writers suggest that interdependence produces greater international conflict, while others suggest that it produces a decline in conflict. These arguments are reviewed and empirically tested here. Previous empirical studies bearing on this issue are found to use inadequate measures and biased samples. More comprehensive analyses presented here suggest that interdependence can have mixed consequences. Several measures of interdependence that embody its costly aspects are found to be positively associated with conflict, implying that interdependence produces increased international conflict. However, when these measures are controlled for, another key measure is found to be inversely related to conflict. This suggests that both schools of thought may be correct: while the costly aspects of interdependence seem to produce greater international conflict, its beneficial aspects appear to produce a decline in conflict.