Russia’s full-scale invasion of Ukraine has turned European Union enlargement from a slow technocratic process into a central instrument of European security. This article argues that Ukraine’s candidacy is pushing the union beyond the classic linear accession model towards a staged integration process, in which security cooperation, sectoral economic access, reconstruction support and governance conditionality advance in parallel. In turn, this shift is forcing the European Union to confront internal constraints in rule-of-law enforcement, decision-making, budgetary redistribution and differentiated integration. Ukraine is therefore not only adapting to the union. It is reshaping how the latter understands enlargement, preparedness and reform.
Ukrainian membership prospects intensify the debate over rule-of-law safeguards, budgetary redistribution, decision-making reform and differentiated integration
