This Article addresses the question of how to explain and justify the allocation of politically sensitive legal questions to civil courts in the European Union. It proposes a pluralist theoretical view on interactions of private law adjudication with legislative initiatives in the process of building a European political community. This is elaborated on the basis of a reconstruction of the interaction between judicial and legislative processes in three high-profile cases (concerning non-discrimination, housing and climate change) in light of three theoretical perspectives: social justice, constitutionalism and public sphere theory. The first two perspectives shed light on the legal-political dimension of private legal questions in the European Union and manners in which to handle the plurality of sources and institutions in this field. They do, however, not fully clarify the distinction and relation between Habermasian discourses of justification and discourses of application of law in European Private Law adjudication. The Article suggests that public sphere theory, with a basis in Fraser’s work on transnationalisation, can complement the theoretical understanding of the role of judges in European Private Law. It is submitted that the interaction between national and European levels of adjudication helps maintain transnational deliberative spheres in which the legal-political stakes behind private law can be discussed. This opens up space for the inclusion of different voices in democratic deliberations on questions of social justice. Private law adjudication may thus be considered to contribute to the initiation of discourses of justification which serve the re-imagination of a European political community.
