
They are:
1. United Ireland (Republic of Ireland and Northern Ireland)
- Population:
- Republic of Ireland: ~5.1 million (2023 estimate)
- Northern Ireland: ~1.9 million (2021 census)
- Combined: ~7 million
- Recent Polling:
- Republic of Ireland: Support at 46% (from map)
- Northern Ireland: Support at 38% (from map); other polls suggest a range from 30%-40%, with higher support among younger demographics.
- Obstacles:
- Political division: Unionist communities in Northern Ireland strongly oppose unification.
- Economic integration: Questions about the financial impact on both regions.
- Constitutional barriers: Requires referenda in both jurisdictions under the Good Friday Agreement.
More about a United Ireland
2. Greater Netherlands (Netherlands and Flanders, Belgium)
- Population:
- Netherlands: ~17.8 million (2023)
- Flanders: ~6.7 million (2023 estimate)
- Combined: ~24.5 million
- Recent Polling:
- Netherlands: Support at 72% (from map)
- Flanders: Support at 26% (from map); limited interest among Flemish people despite cultural and linguistic similarities.
- Obstacles:
- Low support in Flanders: Many Flemish nationalists prefer independence from Belgium over unification with the Netherlands.
- EU dynamics: Such a unification would require renegotiation of treaties and borders.
- Economic disparities: Concerns about wealth distribution and governance.
More about Greater Netherlands
3. Rattachism (France and Wallonia, Belgium)
- Population:
- France: ~67.8 million (2023)
- Wallonia: ~3.7 million (2023 estimate)
- Combined: ~71.5 million
- Recent Polling:
- France: Support at 58% (from map)
- Wallonia: Support at 35% (from map); interest in unification is often linked to dissatisfaction with Belgium’s federal structure.
- Obstacles:
- Political identity: Many Walloons value their Belgian identity and prefer reforms within Belgium rather than unification with France.
- Economic integration: Wallonia’s struggling economy may be a burden on France.
- International politics: Belgium’s dissolution would involve complex negotiations.
More about Rattachism
4. Albania-Kosovo
- Population:
- Albania: ~2.8 million (2023 estimate)
- Kosovo: ~1.8 million (2023 estimate)
- Combined: ~4.6 million
- Recent Polling:
- Albania: Support at 68% (from map); other surveys suggest support fluctuates between 60%-80%.
- Kosovo: Support at 75% (from map); support is consistently high due to shared ethnic Albanian identity.
- Obstacles:
- International recognition: Kosovo’s independence is not universally recognized, complicating unification efforts.
- Regional stability: Opposition from Serbia and other neighboring countries.
- Economic and political challenges: Harmonizing political systems and economies.
- EU and NATO considerations: Both entities would need to align their foreign policies.
More about the Unification of Albania and Kosovo
5. Romania-Moldova
- Population:
- Romania: ~19 million (2023)
- Moldova: ~2.6 million (2023 estimate, excluding Transnistria)
- Combined: ~21.6 million
- Recent Polling:
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- Romania: Support at 77% (from map); other polls show consistent strong support, although this has dropped considerably since the invasion of Ukraine.
- Moldova: Support at 24% (from map); low support stems from political and ethnic diversity.
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- Obstacles:
- Political opposition: Many Moldovans fear losing sovereignty and cultural identity.
- Economic disparities: Moldova is significantly less developed than Romania.
- Geopolitical tensions: Russia’s influence in Moldova and the Transnistrian conflict are significant hurdles.
More about Unification of Moldova and Romania
Which do you think is most likely to happen?








François Rose says
I’m afraid there is a biais in the map, as can be seen in the sources.
I live in Wallonia. The 35% figure shows the part of the Wallon population who would rather join France than stay alone IN CASE of Belgium splitting up, and ONLY in this case.
Moreover, the figures date back to 2010, a time of strong political crisis in Belgium.
The number of Walloons who would like to join France now (2025), whatever the political state of Belgium, is expected to be much lower.
I could’nt find more recent data, I guess because of lack of serious interest in French-Walloon ‘rattachism’ since then.