Dual Citizenship: Challenges and Paradoxes in a Globalized World

Dual citizenship – the legal status of belonging simultaneously to two nations – has quietly moved from rare exception to global commonplace. Around 89 countries today permit some form of dual or multiple nationality, a sharp departure from the early 20th century when most states treated it as a legal anomaly, even a threat. Yet as its prevalence grows, so does the debate around what it actually means – for migrants, for host societies, and for the concept of national belonging itself. Is holding two passports a natural adaptation to a mobile world, or does it paper over deeper questions of loyalty, identity, and social integration?

From anomaly to norm: the global spread of dual citizenship
The assimilation dilemma
Cultural identity under pressure
The loyalty paradox: political rights and divided allegiances
Strategic citizenship: when a passport becomes a commodity
Sending countries and the politics of retained loyalty
Rethinking belonging in a mobile world

From anomaly to norm: the global spread of dual citizenship

For most of modern history, dual citizenship was viewed with deep suspicion. Historically, it was considered at best an anomaly and at worst an abomination. Policymakers feared that dual nationals would refuse to integrate into their adopted country and instead maintain exclusive loyalty to their country of origin. In wartime, the worry was even more acute: divided allegiances could mean split military loyalties. Many nations consequently required new citizens to formally renounce their original nationality.

That consensus began unraveling in the latter half of the 20th century. Over recent decades, an increasing number of policymakers have stopped viewing dual citizenship as a problem and instead begun treating it as an asset for integration, economic competitiveness, and diaspora governance. The shift is partly practical: in an era of mass migration, cross-border marriages, and international study, insisting on a single nationality became increasingly difficult to enforce and, for many states, economically counterproductive.

Transnational communities now possess and nurture identities of multiple belonging, and dual citizenship has emerged as the legal recognition of that reality. But legal recognition of a phenomenon does not resolve its social tensions – and those tensions remain very much alive.

The assimilation dilemma

One of the most persistent critiques of dual citizenship concerns its effect on assimilation – the process by which migrants adopt the language, norms, and civic culture of their new home. Critics argue that maintaining a legal tie to one’s country of origin creates a psychological buffer that slows or prevents full integration into the host society.

Stanley Renshon, writing on dual citizenship and American national identity, argues that when immigrants enter a country whose cultural assumptions are contested and fluid, dual citizenship holders are more likely to maintain their prior cultural attachments rather than consolidate newer ones. From this perspective, the legal option to “keep a foot in both worlds” reduces the social pressure – and perhaps the motivation – to invest deeply in civic life in the adopted country.

However, the empirical picture is more nuanced. Research has shown that dual citizenship, rather than impeding the integration of immigrants, can actually facilitate it by reinforcing attachment to the values and civic culture of the host country. Migrants who are not forced to choose between identities may, in fact, find it psychologically easier to engage with both societies. A Swiss study found that loyalty to both the country of descent and the country of residence can be positively related – suggesting the two are not in competition.

Still, research from the Netherlands found that dual citizens are consistently perceived as having lower national loyalty by the host-country majority, a perception that translates into reduced trust and social acceptance – regardless of the dual citizen’s actual civic behavior. Perception, in other words, matters independently of reality, and it shapes the social environment in which integration either succeeds or stalls.

Cultural identity under pressure

Beyond legal integration, dual citizenship raises deeper questions about cultural identity – who someone is, not just which passport they carry. As one scholar writing in The Sociological Review reflects from personal experience, dual citizenship does not simply offer the freedom of multiple belongings – it forces a recurring choice about where one “belongs,” based not on natural affinity or birthright, but on political comforts and opportunities.

This tension is especially visible for second-generation dual citizens, who may have been born into a hyphenated identity without ever choosing it. In border communities and diaspora settings, dual identity can simultaneously be a source of strength and a source of conflict, creating individuals who feel excluded or scrutinized from both sides. A British-Pakistani teenager, for instance, may feel “too British” when visiting Pakistan and “too Pakistani” in Britain – inhabiting neither identity fully.

Dual citizenship can help preserve cultural traditions that might otherwise fade through assimilation: languages, customs, family networks, and historical memory. But critics argue this preservation can also foster parallel communities – groups that maintain strong internal cohesion while resisting broader integration with the host society. When citizenship encourages groups to turn inward and focus on their difference, it risks undermining the integrative function citizenship is meant to perform.

The loyalty paradox: political rights and divided allegiances

Citizenship has always carried a political dimension – the right and obligation to participate in collective self-governance. Dual citizenship complicates this by allowing individuals to vote, and in some cases hold office, in more than one country. This raises the democratic concern of dual transnational voting, which sits in tension with the foundational principle of one person, one vote.

The question of military obligation adds another layer. South Korean dual citizens, for example, face mandatory military service requirements that can directly conflict with their lives and commitments in their country of residence, forcing difficult decisions that no purely civic framework can resolve cleanly. Early 20th-century policymakers worried precisely about this scenario – that dual citizenship would violate democratic legitimacy and create “foreign” interference by citizens belonging to enemy states. While the geopolitical context has changed, the structural concern has not disappeared.

Research in social psychology confirms that the suspicion of divided loyalties has animated national policy debates and contributes to measurable bias toward immigrants who hold dual citizenship. This shapes not just public attitudes but actual policy: several European countries, including Denmark, France, the Netherlands, and the UK, have introduced increasingly stringent language and civic knowledge tests as preconditions for naturalization, partly as a response to concerns about insufficient commitment to the host country.

Strategic citizenship: when a passport becomes a commodity

Perhaps the most sociologically pointed critique of dual citizenship is what scholars call strategic citizenship – the pursuit of a second nationality not out of emotional attachment or cultural connection, but as a calculated move to access economic advantages. Research shows that from many dual citizens’ perspectives, much of the value of a second citizenship lies not in social welfare or voting rights, but in securing an advantageous position within a global hierarchy of travel freedom. A second passport is treated as an insurance policy, a mobility tool, or a status symbol – not as an expression of belonging.

This logic is most visible in citizenship-by-investment programs. Caribbean nations such as St. Kitts and Nevis, Antigua and Barbuda, and several EU member states offer citizenship to individuals who make qualifying financial investments, creating what critics call economic citizenship – legal membership stripped of any genuine cultural or civic connection. Critics argue that acquiring citizenship without giving anything up – without sacrificing social benefits, welfare, or employment ties to the country of origin – trivializes the meaning of national belonging and reduces citizenship to a convenient economic instrument.

A McGill University research paper raises this directly, questioning whether diaspora engagement policies actually target specific populations based on what they can offer the home state – particularly remittances and investment – rather than on genuine cultural or civic affiliation. Remittances to low- and middle-income countries reached an estimated $685 billion through formal channels in 2024, and governments are well aware that dual citizenship can be a lever to keep that flow moving. The extension of dual citizenship rights thus becomes, in some cases, less a recognition of complex identity and more a tool of diaspora economic governance.

Sending countries and the politics of retained loyalty

The instrumentalization of dual citizenship is not only a story of individual calculation – it is also a story of state strategy. Research shows that home countries extend dual citizenship rights partly to leverage the financial and human capital of their diasporas, encouraging both remittances and the prospect of return migration. Mexico, for example, once penalized emigrants who acquired foreign citizenship by withdrawing their original nationality. It reversed this position when it recognized that Mexican identity – mexicanidad – could coexist with US citizenship, and that retaining legal ties to emigrants kept remittance flows intact.

This reveals a structural paradox. Dual citizenship creates a set of inequalities between origin and host countries, and by default among citizens themselves – particularly when significant social and economic disparities exist between the two countries involved. The dual citizen who holds a powerful Northern passport gains privileges in their country of origin that single-nationality citizens there do not have. Meanwhile, in the host country, that same person may be viewed as a second-class citizen – naturalized rather than native-born, legally admitted but not fully socially accepted.

As political elites increasingly recognize the economic relevance of remittances, dual citizenship has become part of a broader diaspora governance agenda – where the rhetoric of cultural connection and emotional ties to the homeland often masks a more calculated politics of economic retention. The emotional and the instrumental become difficult to disentangle, both for individuals navigating their identities and for states managing their diasporas.

Rethinking belonging in a mobile world

Dual citizenship sits at the intersection of some of the most contested questions in contemporary social life: What does it mean to belong to a nation? Can genuine civic commitment be divided? And who benefits when it is? The concept does not lend itself to simple answers. For many migrants, dual citizenship genuinely reflects a lived reality of split emotional worlds, transnational families, and hybrid identities. For others – and for many states that facilitate it – it functions more as a legal convenience than a meaningful bond.

Research across 14 Western democracies suggests that immigrants experience stronger attachment to the host nation when they hold its citizenship – but this effect is most pronounced in countries where the host population already treats citizenship as a meaningful marker of national membership. In other words, citizenship functions differently depending on the social and cultural context in which it is embedded. A passport is never just a document.

What the debate ultimately reveals is a tension between two models of citizenship that have always coexisted uneasily: citizenship as a legal status conferring rights and mobility, and citizenship as a civic identity demanding loyalty, participation, and genuine social integration. Dual citizenship does not resolve that tension – it makes it visible.

What do you think? Does the growing normalization of dual citizenship reflect a genuine evolution in how identity works in a globalized world – or does it risk reducing national belonging to a transaction? And when home countries extend citizenship rights primarily to retain diaspora remittances, can the emotional ties they claim to be nurturing be considered authentic?

References

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Table of Contents

From anomaly to norm: the global spread of dual citizenship 🔗

The assimilation dilemma 🔗

Cultural identity under pressure 🔗

The loyalty paradox: political rights and divided allegiances 🔗

Strategic citizenship: when a passport becomes a commodity 🔗

Sending countries and the politics of retained loyalty 🔗

Rethinking belonging in a mobile world 🔗