I n the context of the communal relationships in Belgium, the evocation of the causes of the past is a common place in the analysis of the tensions and conflicts that mark out these relations. The adoption of a framework of analysis of path depen- dence elaborated in the field of historical sociology allows to test and precise the affirmation that Bel- gian past shapes the conflictual present. The recourse to this theoretical and methodological scaffold is intended to explain, by following the evolution of a historical trajectory initiated at the end of the nineteenth century, the regular conflicts and the model of increasing autonomy that cha- racterize Belgian political scene.