Published online: 15 November 2021The ideology of Europeanism – defined as a commitment to the political, economic, and cultural consolidation of the European continent – has undergone major transformations during the twentieth century. Yet the study of Europeanism has not as yet systematically examined the range of conceptual meanings that the various strands of the Europeanist ideological family exhibit. Instead, Europeanism has typically been treated either ahistorically as a set of desirable social ideals and values, or reductively as a quality exclusively associated with European institutions in their current form. Both obscure the fundamental, wide-ranging debates over the nature of ‘Europe’ and ‘Europeanness’ that have shaped the sub...