Contemporary debates on the nature and value of the European Union often touch on the notion of ideology. The EU’s critics routinely describe it as an ideologically-motivated project, associating it from the left with a form of ‘neo-liberal capitalism’ or from the right with ‘liberal multiculturalism’. Its defenders often praise it in explicitly post- or anti-ideological terms, as a regulatory body focused on the production of output legitimacy, or as a bulwark against dangerous ideological revivals in the form of nationalism and populism. Yet the existing academic literature linking the study of the EU with that of ideologies is surprisingly thin. This volume brings together a number of original contributions by leading international scholars and takes an approach that is both historical and conceptual, probing the EU’s ideological roots, while also laying the grounds for a reappraisal of its contemporary ideological make-up. The chapters in this book were originally published as a special issue of the