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Switzerland likely has the most particular naturalization system in the world. Whereas in most countries citizenship attribution is regulated at the central level of the state, in Switzerland each municipality is accorded the right to decide who can become a Swiss citizen. This book aims at exploring naturalization processes from a comparative perspective and to explain why some municipalities pursue more restrictive citizenship policies than others. The Swiss case provides a unique opportunity to approach citizenship politics from new perspectives. It allows us to go beyond formal citizenship models and to account for the practice of citizenship. The analytical framework combines quantitative and qualitative data and helps us understand how negotiation processes between political actors lead to a large variety of local citizenship models. An innovative theoretical framework, integrating Bourdieu's political sociology, combines symbolic and material aspects of naturalizations and underlines the production processes of ethnicity. Zwitserland heeft waarschijnlijk het meest uitzonderlijke naturalisatiesysteem ter wereld: staatsburgerschap wordt toegewezen op gemeentelijk niveau en niet vanuit de centrale overheid. Dit boek bestudeert naturalisatieprocessen vanuit een vergelijkend perspectief en probeert te verklaren waarom sommige gemeenten strengere regels hanteren dan anderen. Het Zwitserse voorbeeld geeft een unieke mogelijkheid om voorbij de formele staatsburgerschapmodellen te kijken.

During the nineteenth and early twentieth centuries, a majority of the Mexican immigrant population in the United States resided in Texas, making the state a flashpoint in debates over whether to deny naturalization rights. As Texas federal courts grappled with the issue, policies pertaining to Mexican immigrants came to reflect evolving political ideologies on both sides of the border. Drawing on unprecedented historical analysis of state archives, U.S. Congressional records, and other sources of overlooked data, Naturalizing Mexican Immigrants provides a rich understanding of the realities and rhetoric that have led to present-day immigration controversies. Martha Menchacas groundbreaking research examines such facets as U.S.-Mexico relations following the U.S. Civil War and the schisms created by Mexican abolitionists; the anti-immigration stance that marked many suffragist appeals; the effects of the Spanish American War; distinctions made for mestizo, Afromexicano, and Native American populations; the erosion of means for U.S. citizens to legalize their relatives; and the ways in which U.S. corporations have caused the political conditions that stimulated emigration from Mexico. The first historical study of its kind, Naturalizing Mexican Immigrants delivers a clear-eyed view of provocative issues.

Between 2000 and 2011, eight million immigrants became American citizens. In naturalization ceremonies large and small these new Americans pledged an oath of allegiance to the United States, gaining the right to vote, serve on juries, and hold political office; access to certain jobs; and the legal rights of full citizens.  In  The Road to Citizenship , Sofya Aptekar analyzes what the process of becoming a citizen means for these newly minted Americans and what it means for the United States as a whole. Examining the evolution of the discursive role of immigrants in American society from potential traitors to morally superior “supercitizens,” Aptekar’s in-depth research uncovers considerable contradictions with the way naturalization works today. Census data reveal that citizenship is distributed in ways that increasingly exacerbate existing class and racial inequalities, at the same time that immigrants’ own understandings of naturalization defy accepted stories we tell about assimilation, citizenship, and becoming American. Aptekar contends that debates about immigration must be broadened beyond the current focus on borders and documentation to include larger questions about the definition of citizenship.  Aptekar’s work brings into sharp relief key questions about the overall system: does the current naturalization process accurately reflect our priorities as a nation and reflect the values we wish to instill in new residents and citizens? Should barriers to full membership in the American polity be lowered? What are the implications of keeping the process the same or changing it? Using archival research, interviews, analysis of census and survey data, and participant observation of citizenship ceremonies,  The Road to Citizenship  demonstrates the ways in which naturalization itself reflects the larger operations of social cohesion and democracy in America.

Between 2003 and 2008, Germany and the Netherlands have replaced informal interviews with local officials by formalised language and knowledge of society tests (‘citizenship tests’) to determine whether long-term resident immigrants have sufficiently integrated to become citizens. In this contribution, the questions of why the citizenship tests were introduced and of which effects these tests have produced in Germany and the Netherlands will be answered. By doing so, the author aims to contribute to answering the question of whether language and cultural requirements can be considered liberal, which, as has been claimed, remains an unresolved issue relating to civic integration policies. Scholars disagree on whether citizenship tests can be justified in the liberal model for citizenship. Liberal minimalists oppose the introduction of requirements barring permanent residents from full-fledged citizenship. Liberal nationalists think citizenship tests can be justified in case they encourage the acquisition of competences that play an important role in creating or sustaining a reasonably just society. The author concludes that proponents of introducing citizenship tests have indeed asserted that these tests are required for prospective citizens to be able to develop the competences that play an important role in creating or sustaining a reasonably just society. Far more important explanations for the introduction of citizenship tests can however be sought in the linking of naturalisation policy to integration policy, and in the desire to promote uniformity in the application of the language and integration requirement as a condition for naturalisation. As regards the effects produced by the tests, the author shows that the tests permanently exclude certain categories of immigrants from becoming full-fledged members of society. The conclusion can therefore be drawn that the citizenship tests applied by Germany and the Netherlands cannot be justified in the liberal model for citizenship.

The literature on biological invasions is biased in favour of invasive species – those that spread and often reach high abundance following introduction by humans. It is, however, also important to understand previous stages in the introduction'naturalization invasion continuum (‘the continuum’), especially the factors that mediate naturalization. The emphasis on invasiveness is partly because most invasions are only recognized once species occupy large adventive ranges or start to spread. Also, many studies lump all alien species, and fail to separate introduced, naturalized and invasive populations and species. These biases impede our ability to elucidate the full suite of drivers of invasion and to predict invasion dynamics, because different factors mediate progression along different sections of the continuum. A better understanding of the determinants of naturalization is important because all naturalized species are potential invaders. Processes leading to naturalization act differently in different regions and global biogeographical patterns of plant invasions result from the interaction of population-biological, macroecological and human-induced factors. We explore what is known about how determinants of naturalization in plants interact at various scales, and how their importance varies along the continuum. Research that is explicitly linked to particular stages of the continuum can generate new information that is appropriate for improving the management of biological invasions if, for example, potentially invasive species are identified before they exert an impact.

Citizenship testing in the UK assesses the applicant’s knowledge of English and of life in the UK as part of a legal requirement. This testing is one part of the British citizenship process which also creates other forms of assessment for applicants that function as bordering techniques. This paper demonstrates how these non-test forms of assessment emerge, in some cases, before the citizenship test through pre-arrival language testing for non-EU spouses and family reunification. They also take place after the citizenship test through citizenship ceremonies and post-ceremony passport interviews. The data is drawn from a four year project examining the experiences of those experiencing the citizenship process. Using the notion of raciolinguistic perspectives and Derrida’s metaphor of the Shibboleth, I show how the individual may stand in the face of judgment in various forms through their interactions with the State. The multiple assessment points in the naturalisation process beyond the main test itself enforce the need for ‘believeability’ of the applicant who must submit themselves to be assessed – in some cases, repeatedly.

This article presents what we term a raciolinguistic perspective, which theorizes the historical and contemporary co-naturalization of language and race. Rather than taking for granted existing categories for parsing and classifying race and language, we seek to understand how and why these categories have been co-naturalized, and to imagine their denaturalization as part of a broader structural project of contesting white supremacy. We explore five key components of a raciolinguistic perspective: (i) historical and contemporary colonial co-naturalizations of race and language; (ii) perceptions of racial and linguistic difference; (iii) regimentations of racial and linguistic categories; (iv) racial and linguistic intersections and assemblages; and (v) contestations of racial and linguistic power formations. These foci reflect our investment in developing a careful theorization of various forms of racial and linguistic inequality on the one hand, and our commitment to the imagination and creation of more just societies on the other. (Race, language ideologies, colonialism, governmentality, enregisterment, structural inequality)*

The difference between French and German definitions of citizenship is instructive-and, for millions of immigrants from North Africa, Turkey, and Eastern Europe, decisive. Rogers Brubaker shows how this difference-between the territorial basis of the French citizenry and the German emphasis on blood descent-was shaped and sustained by sharply differing understandings of nationhood, rooted in distinctive French and German paths to nation-statehood.

1. Most naturalised and invasive alien plant species were originally introduced to regions for horticultural purposes. However, many regions now face an invasion debt from ornamental alien species, which have not yet naturalised. In this regard, climate change represents a threat as it may lower the barriers to naturalisation for some ornamental alien species. Identifying those species is extremely important for anticipating impending invasions. 2. To identify predictors of naturalisation, we modelled the effects of climate, nursery availability and species characteristics on the current European naturalisation success of 2,073 ornamental aliens commonly planted in European gardens. We then used the resulting model together with climate projections for 2050 to forecast future naturalisation risks for the 1,583 species not yet naturalised in Europe. 3. We found that non-European naturalised range size, climatic suitability, propagule pressure, having a dioecious sexual system and plant height jointly explained current naturalisation success in Europe. By 2050, naturalisation probability projections increased by more than 0.1 for 41 species, and only decreased by more than 0.1 for one species. 4. Policy implications. Using predictions based on our integrated model of alien ornamental naturalisation success, we identified species with high future naturalisation risk and species with high projected increases in naturalisation potential in Europe under climate change. This species list allows for prioritisation of monitoring and regulation of ornamental plants to mitigate the invasion debt.