The debate surrounding the European Union’s potential expansion is no longer really about Ukraine and the western Balkans. Enlargement is now an existential question with far-reaching implications for the EU and its ability to remain a prominent player in a rapidly changing global environment. BERLIN – Where will Europe’s borders end? On Oct. 6, EU leaders convened in Granada, Spain, to discuss a question that has captivated Eurocrats, think tanks, and journalists throughout the bloc since the