For more than two decades the European Union has presented enlargement toward the Western Balkans as both a strategic objective and a normative commitment. The promise of eventual membership has been repeatedly reaffirmed since the Thessaloniki Summit of 2003, when the EU formally declared that the future of the Western Balkans lies within the Union. Yet as the years pass and accession remains distant, the gap between political rhetoric and practical progress has become increasingly visible. The enlargement process, once seen as the EU’s most powerful geopolitical instrument, now appears entangled in institutional fatigue, political hesitation, and shifting strategic priorities.
The central question increasingly debated across the region is whether the European Union is still offering a realistic pathway to membership—or whether the enlargement narrative has gradually transformed into a symbolic promise whose realization remains uncertain.
The legacy of the enlargement model
The EU’s enlargement policy historically represented one of the most successful instruments of European transformation. During the 1990s and early 2000s the accession process facilitated the political and economic integration of Central and Eastern Europe into the European institutional framework. Countries such as Poland, Hungary, the Czech Republic, and later Romania and Bulgaria undertook extensive reforms in governance, rule of law, and market regulation as a prerequisite for joining the Union.
The credibility of enlargement rested on a simple but powerful principle: reforms would be rewarded with membership. This conditionality mechanism created a strong incentive structure. Candidate countries were willing to implement painful economic restructuring and political reforms because accession was perceived as both achievable and strategically valuable.
However, the Western Balkans enlargement process unfolded in a different historical context. Unlike the earlier waves of enlargement, the region entered the accession process after the EU itself began experiencing internal crises. The financial crisis of 2008, the migration crisis of 2015, the United Kingdom’s withdrawal from the Union, and growing political fragmentation among member states have significantly altered the political climate surrounding enlargement. As a result, the once-clear pathway to membership has become increasingly uncertain.
The Western Balkans and the Politics of waiting
Countries of the Western Balkans—Serbia, Montenegro, North Macedonia, Albania and Bosnia and Herzegovina—have all formally expressed the ambition to join the European Union. Some have made significant progress in the accession process. Montenegro and Serbia have opened numerous negotiation chapters, while Albania and North Macedonia have advanced through various stages of the candidate process.
Yet the overall pace of enlargement has slowed dramatically. Negotiations have often been delayed by bilateral disputes, internal EU disagreements, or concerns related to democratic governance and rule-of-law reforms. As a result, accession timelines have become increasingly vague. For many societies in the region, the promise of EU membership has gradually shifted from a concrete political objective to a long-term aspiration with no clear endpoint.
This prolonged waiting period carries significant political consequences. The longer accession remains uncertain, the more difficult it becomes for reform-oriented governments to maintain domestic political support for EU-driven reforms. Citizens who initially embraced the European perspective with optimism increasingly question whether the Union genuinely intends to integrate the region or whether enlargement has become a rhetorical commitment without strategic urgency.
Enlargement fatigue within the European Union
A key factor shaping the current enlargement dynamic is the phenomenon often described as “enlargement fatigue.” Several EU member states have become increasingly cautious about further expansion of the Union. Concerns about institutional capacity, migration pressures, economic disparities, and internal political cohesion have contributed to a growing reluctance among some governments to support rapid enlargement.
This hesitation has been reflected in various political debates across the Union. In some member states, enlargement has become a domestic political issue, with skepticism toward new members often linked to broader concerns about sovereignty, economic competition, or migration management. As a result, consensus on enlargement—once considered a cornerstone of European integration—has become more difficult to achieve.
The requirement for unanimous approval among EU member states at key stages of the accession process further complicates the situation. Even a single member state can effectively block progress in negotiations, often due to bilateral disputes unrelated to the technical criteria of accession. Such political obstacles have repeatedly delayed negotiations with Western Balkan candidates, reinforcing the perception that the enlargement process is increasingly politicized.
Strategic ambiguity and the geopolitical dimension
The Western Balkans occupies a strategically important position within Europe’s geopolitical landscape. The region lies at the crossroads of several geopolitical interests, including those of Russia, China, Turkey, and increasingly the United States. The EU has long emphasized that integration of the Western Balkans is essential for maintaining stability and political cohesion across the continent.
However, the slow pace of enlargement has created a geopolitical vacuum that external actors have increasingly sought to fill. China has expanded its economic presence through infrastructure investment and trade partnerships. Russia maintains influence through energy ties and political networks in several countries. Turkey continues to develop cultural and economic relationships across parts of the region.
These developments have raised concerns within European policy circles that prolonged enlargement delays could weaken the EU’s strategic influence in Southeast Europe. While the EU remains by far the largest trading partner and investor in the region, competing geopolitical narratives have gained traction, particularly in societies where frustration with the slow accession process is growing.
Reform conditionality and credibility challenges
Another challenge facing the enlargement process relates to the credibility of the conditionality framework. The EU continues to emphasize that accession depends on fulfilling strict criteria related to democratic governance, rule of law, economic reform, and institutional capacity. In principle, these criteria are designed to ensure that new members are fully prepared to integrate into the Union’s political and economic structures.
Yet critics argue that the credibility of this framework has weakened over time. In some cases, candidate countries have implemented substantial reforms without seeing corresponding progress in accession negotiations. When political blockages arise despite reform efforts, governments in the region may question whether the conditionality system still functions as originally intended.
Moreover, the EU itself has increasingly debated internal reforms before any new enlargement can occur. Discussions about institutional reform, budget structures, and decision-making mechanisms suggest that the Union may require significant internal adjustments before integrating additional member states. This creates an additional layer of uncertainty for candidate countries, which must navigate reforms without knowing when the institutional door to membership will fully open.
The psychological impact of the accession process
The long-term uncertainty surrounding enlargement has also produced a psychological dimension within Western Balkan societies. In the early years of the accession process, public opinion in many countries strongly supported EU membership. The European Union was widely viewed as a symbol of economic modernization, democratic governance, and international integration.
However, as accession timelines extend further into the future, public enthusiasm has gradually declined in several countries. Polling data across the region shows varying levels of support for EU membership, often influenced by perceptions of fairness in the accession process and the EU’s willingness to deliver on its promises.
Political elites within the region face a complex dilemma. While most governments continue to pursue EU integration as their official strategic goal, they must also manage domestic expectations in an environment where accession remains distant. In some cases, political actors have begun exploring alternative economic or geopolitical partnerships alongside the European path.
The EU’s strategic dilemma
For the European Union, enlargement toward the Western Balkans presents a strategic dilemma. On one hand, integrating the region would strengthen political stability in Southeast Europe, reinforce the EU’s geopolitical influence, and complete the long-term process of European reunification after the Cold War.
On the other hand, enlargement raises difficult questions about the Union’s institutional capacity, budgetary commitments, and internal political cohesion. Expanding the Union to include several additional member states would require adjustments in voting procedures, financial redistribution mechanisms, and policy coordination structures.
The EU must therefore balance two competing objectives: maintaining the credibility of its enlargement promise while ensuring that internal institutional structures remain functional. Achieving this balance requires careful political coordination among member states as well as renewed strategic clarity regarding the future of the enlargement process.
Rebuilding credibility in the enlargement process
If the European Union intends to maintain the Western Balkans enlargement perspective as a credible policy, several steps may be necessary to restore confidence in the process. First, the EU may need to provide clearer timelines and benchmarks for candidate countries. While accession will inevitably remain conditional on reforms, greater transparency regarding expected milestones could help reduce uncertainty.
Second, the EU could consider intermediate forms of integration that allow Western Balkan countries to participate more deeply in European economic and institutional frameworks before full membership. Enhanced participation in the single market, energy integration, and digital infrastructure cooperation could help bridge the gap between candidacy and accession.
Finally, political leadership within the EU will be essential for sustaining the enlargement agenda. Without strong commitment from major member states, the enlargement process risks stagnation, leaving both the EU and the Western Balkans in a prolonged state of strategic ambiguity.
Between promise and reality
The debate about whether the European Union is offering the Western Balkans a realistic path to membership reflects a broader tension between strategic vision and political reality. Enlargement remains officially embedded within the EU’s long-term policy framework, yet practical progress continues to unfold slowly and unevenly.
For the countries of the Western Balkans, the EU accession process remains the most comprehensive framework for political and economic modernization. At the same time, the credibility of this framework depends on the Union’s ability to transform political commitments into tangible progress.
The future of enlargement will therefore depend not only on reforms within candidate countries but also on the EU’s willingness to redefine its strategic priorities. If the Union can reestablish a credible and forward-looking enlargement policy, integration of the Western Balkans may still become one of the defining projects of European integration in the coming decades. If uncertainty persists, however, the promise of membership may increasingly resemble a distant aspiration rather than a concrete political destination.
