EU citizenship: Still a Fundamental Status? Jo Shaw Introduction Modern history is littered with the corpses of failed federations and busted unions. These processes of breakup have had significant and often damaging citizenship consequences on many occasions and in many places. Examples can be found in the dissolution of Yugoslavia and of the Soviet Union, as well as in the dismantling of the various European empires and the creation of numerous new (and generally arbitrarily defined) states, often as part of the decolonisation process.1 Breakup may, of course, eventually be the fate of the European Union. Or it may be the opposite – the transmutation of the EU into something more like a federal state, through an intensified constitutionalisation process. This essay explores some of the pressures that are being placed on the concept of citizenship of the Union at the present time, highlighting how these stem both from exogenous pressures (assuming Brexit can be thought to be such) and endogenous forces such as Eurosceptic voting publics and a resistance to showing solidarity across the member states in an era of austerity. EU citizenship is paradoxical in nature: formally constitutionalised in the Union’s treaty framework, yet dependent upon national citizenship to provide the gateway to membership. Its fate remains intimately tied to the broader question of the trajectory of European integration, as well as to changing perspectives about the character of citizenship as a membership status. To highlight that paradoxical character, I offer below some brief reflections on the autonomy of national citizenship laws, on the consequences of Brexit, and on how choices and actions by individuals and groups may 1 For an overview of different ‘imperial’ repertoires see Gammerl, B. (2017), Subject, citizens, and others: Administering Ethnic Heterogeneity in the British and Habsburg Empires, 1867–1918. New York/Oxford: Berghahn Books. This essay was written whilst I was holding a EURIAS Fellowship at the Helsinki Collegium for Advanced Studies, and the financial support of the EURIAS Programme and HCAS is acknowledged with thanks. I am very grateful to Rainer Bauböck for comments on a draft. © The Author(s) 2019 R. Bauböck (ed.), Debating European Citizenship, IMISCOE Research Series, https://doi.org/10.1007/978-3-319-89905-3_1 1