Former Commission President Juncker proclaimed that 'solidarity is the glue that keeps our Union together'. But behind this general claim, the concept of solidarity remains nebulous. A federal perspective, argues Aline Bartenstein, helps us to understand the features of solidarity between member states, and why the counter-principle of subsidiarity is necessary
Researcher at the Institute for Peace Research and Security Policy, University of Hamburg
Aline received her PhD from the University of Cologne.
Her research explores intergovernmental solidarity and the institutionalisation of solidarity at the EU level, EU internal security and the EU as security provider, Schengen narratives and the EU's ontological security.
Since 2021, she has been part of theZUSE project. The objective of this interdisciplinary research project is a more nuanced and differentiated understanding of security as a guiding concept of European solidarity and cohesion.