ISSUE: 2/2021

  • Volume 25
  • Number 2
  • 2021

Studia Europejskie –
Studies in European Affairs

ISSN: 1428-149X
e-ISSN: 2719-3780

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Articles published in the journal are under a Creative Commons Attribution – Non Commercial – No Derivatives 4.0 International License

Between Differentiation and (Dis)Integration – Theoretical Explanations of a Post-Brexit European Union


The authors of this paper provide a critical analysis of the most prominent theoretical vehicles employed in studying differentiated integration in contemporary, post-Brexit Europe. They discuss the descriptive, explanatory, and interpretative potential of the selected theoretical approaches that are applied at the intersection of disintegration and European differentiation discourse. “The holy grail” of the theorising of the dynamic (and accelerating) processes of (dis)integration and differentiation remains undiscovered. Nevertheless, a constant search for theoretical explanation is needed in the in-depth analyses of the current state of the European Union.


Adler-Nissen R., Behind the Scenes of Differentiated Integration: Circumventing National Opt-Outs in Justice and Home Affairs, “Journal of European Public Policy”, no. 16(1)/2009, DOI: https://doi. org/10.1080/13501760802453239.

Andersen S.S., Sitter N., Differentiated Integration: What is it and How Much Can the EU Accommodate?, “Journal of European Integration”, no. 28(4)/2006, DOI:

Balzacq T., Hadfi eld A., Differentiation and Trust: Prüm and the Institutional Design of EU Internal Security, “Cooperation and Conflict”, no. 47(4)/2012, DOI:

Czech S., Krakowiak-Drzewiecka M., The rationale of Brexit and the theories of European integration, “Oeconomia Copernicana”, no. 10/2019, DOI:

De Neve J.E., The European Onion? How Differentiated Integration is Reshaping the EU, ”Journal of European Integration”, no. 29(4)/2007, DOI:

Ethier Wilfred J., The International Commercial System. Essays in International Commercial System, Princeton University – Department of Economics, “Essays in International Finance”, no. 210/1998, https://ies.princeton. edu/pdf/E210.pdf (access 1.04.2021).

European Union and New Regionalism: Regional Actors and Global Governance in a Post-Hegemonic Era, ed. M. Telò, Ashgate, Aldershot 2001.

Farrell M., From EU Model to External Policy? Promoting Regional Integration in the Rest of the World, in: Making History: European Integration and Institutional Change at Fifty, eds. S. Meunier, K.R. McNamara, Oxford University Press, Oxford 2007.

Ferry J.-M., La Question de L’État Européen, Gallimard, Paris 2000.

Fligstein N., Polyakova A., Sandholtz W., European Integration, Nationalism and European Identity, “Journal of Common Market Studies”, no. 50(S1)/2012, DOI:

Haas Ernst B., The Uniting of Europe. Political, Social and Economic Forces, 1950–1957, 2nd. Edition, Stanford 1958.

Hix S., The Political System of the European Union, Palgrave Macmillan, Basingstoke 2005.

Hooghe L., Marks G., A Postfunctionalist Theory of European Integration: From Permissive Consensus to Constraining Dissensus, “British Journal of Political Science”, no. 39/2009, DOI: 408000409.

Hooghe L.G., Grand theories of European integration in the twenty-first century, “Journal of European Public Policy”, no. 26(8)/2019, DOI:

Isernia P., et al., But Still It Does Not Move: Functional and Identity-Based Determinants of European Identity, in: Citizens and the European Polity: Mass Attitudes Towards the European and National Polities, eds. D. Sanders, P. Magalhaes, G. Toka, Oxford University Press, Oxford 2012, DOI:

Jones E., Towards a theory of disintegration, ”Journal of European Public Policy”, no. 25(3)/2018, DOI: 1411381.

Leruth B., Gänzle S., Trondal J., Differentiated integration and disintegration in the European Union after Brexit: risks versus Opportunities, “Journal of Common Market Studies”, no. 57(6)/2019, DOI: https://doi. org/10.1111/jcms.12957.

Leruth B., Gänzle S., Trondal J., Exploring Differentiated Disintegration in a Post-Brexit European Union, “Journal of Common Market Studies”, no. 57(5)/2019, DOI:

Leruth B., Lord C., Differentiated integration in the European Union: a concept, a process, a system or a theory?, “Journal of European Public Policy”, no. 22(6)/2015, DOI:

Leuffen D., Rittberger B., Schimmelfennig F., Differentiated Integration. Explaining Variation in the European Union, Palgrave, Basingstoke 2013, DOI:

Marcussen M., Out of the Box: Coping Successfully with Euro-Outsiderness, “Cooperation and Confl ict”, no. 44(2)/2009, DOI: https://doi. org/10.1177/0010836709102737.

Miles L., Introduction: Euro-outsiders and the Politics of Asymmetry, “Journal of European Integration”, no. 27(1)/2005, DOI: https://doi. org/10.1080/07036330400029876.

Nugent N., The government and politics of the European Union, 6th editon, Palgrave Macmillan, New York 2006.

Olsen J.P., Governing through Institution Building, Oxford University Press, Oxford 2010, DOI:

Olsen J.P., Europeanization and nation-state dynamics, in: The Future of the Nation-State, eds. S. Gustavsson, L. Lewin, Routledge, London 1996.

Peitz L., Dhont K., Seyd B., The Psychology of Supranationalism: Its Ideological Correlates and Implications for EU Attitudes and post-Brexit Preferences, “Political Psychology”, no. 39/2018, DOI: https://doi. org/10.1111/pops.12542.

Riedel R., Great Britain and Differentiated Integration in Europe, in: Brexit, History, Reasoning and Perspectives, eds. D. Ramiro Troitino, T. Kerikmä e, A. Chochia, Springer Publications, Cham 2018, DOI:

Sandholtz W., Stone Sweet A., European Integration and Supranational Governance, Oxford University Press, Oxford 1998, DOI: https://doi.o rg/10.1093/0198294646.001.0001.

Schimmelfennig F., Brexit: differentiated disintegration in the European Union, “Journal of European Public Policy”, no. 1(20)/2018.

Schimmelfennig F., Leuffen D., Rittberger B., The European Union as a system of differentiated integration, politicization and differentiation, “Journal of European Public Policy”, no. 22(6)/2015, DOI: https://doi. org/10.1080/13501763.2015.1020835.

Schimmelfennig F., Negotiating differentiated disintegration in the European Union, in: Differentiated Integration and Disintegration in a Post-Brexit Era, Routledge, Abingdon 2019, DOI: https://doi. org/10.4324/9780429026959-2.

Schimmelfennig F., Winzen T., Ever looser union? Differentiated European integration, Oxford University Press, Oxford 2020, DOI: https://doi. org/10.1093/oso/9780198854333.001.0001.

Schimmelfennig F., Winzen T., Grand theories, differentiated integration, “Journal of European Public Policy”, no. 26(8)/2019, DOI: https://doi. org/10.1080/13501763.2019.1576761.

Schmidt V.A., The European Union: Democratic Legitimacy in a Regional State, “Journal of Common Market Studies”, no. 42(4)/2004, DOI:

Schmitter P.C., Lefkofridi Z., Neo-Functionalism as a Theory of Disintegration, “Chinese Political Science Review”, no. 1/2016, DOI:

Schmitter P.C., On the Way to a Post-Functionalist Theory of European Integration, “British Journal of Political Science”, no. 39/2008, DOI:

Stubb A., A Categorization of Differentiated Integration, “Journal of Common Market Studies”, no. 34(2)/1996, DOI: 5965.1996.tb00573.x.

Tekin F., Differentiated Integration at Work: the Institutionalization and Implementation of Opt-Outs from European Integration in the Area of Freedom, Security and Justice, “Studies on the European Union”, no. 6/2012, DOI:

The European Union and Member states, eds. E. Zeff, E.B. Pirro, Boulder, London 2001. The Politics of Europeanization, eds. K. Featherstone, C.M. Radaelli, Oxford University Press, Oxford 2003.

Tindemans L., European Union. Report by Mr. Leo Tindemans, Prime Minister of Belgium, to the European Council, “Bulletin of the European Communities”, Supplement 1/76, 1975.

Vollaard H., Explaining European Disintegration, “Journal of Common Market Studies”, no. 52(5)/2014, DOI: jcms.12132.

Wiener A., Börzel T.A., Risse T., European Integration Theory, Third edition, Oxford University Pres, Oxford 2019, DOI:

Language: English

Pages: 7-27

How to Cite:


Gierlich, C. and Riedel, R. (2021) "Between Differentiation and (Dis)Integration – Theoretical Explanations of a Post-Brexit European Union". Studia Europejskie – Studies in European Affairs, 2/2021, pp. 7-27. DOI: 10.33067/SE.2.2021.1