To analyse the Spanish national question requires considering the relationship between the idea of the nation and the phenomenon of nationalism on one side, and the question of political plurality on the other. The approval of the Constitutional text 40 years ago was achieved thanks to a delicate semantic balancing act concerning the concept of nation, whose interpretation remains open. Academic studies of public opinion, such as the famous Linz-Moreno Question—also known as Moreno Question—that measures the possible mixture of Spanish subjective national identity, are equally the object of wide controversy. The extent to which political plurinationality is a suitable concept for defining the country is not clear because, amongs...