Although seventeen years have elapsed since NATO’s military intervention, policy makers should not assume that all conflicts in the Western Balkans have been assigned to history. Disputes continue to fester over statehood, territory, and political authority, compounded by the uncertainties of international integration. The promise of EU and NATO membership has been the key incentive to democratize each state and promote inter-ethnic co-existence. Without that prospect reforms falter and local disputes are revived. In the wake of the EU’s existential crisis and preoccupation with “Brexit,” enlargement is not high on the Union’s agenda. It seems unlikely that any country can be considered for accession for at least a decade. Such receding opportunities for membership will undermine Balkan commitments to the rule of law and can result in democratic reversals.