This paper examines the relationship between nationalism and public opinion in the region of Catalonia in contemporary Spain. It analyzes the interaction of the climate of opinion, expectations, poll results, and political action. This holistic approach permits a conclusion that successive Catalan governments and the political class, in an effort to solidify their foothold in and emerging democracy, have been successful in creating a climate of opinion that has encouraged the nationalist part of the Catalan population, concentrated proportionally in highest socioeconomic strata, to be actively involved in politics, while at the same time demobilizing a significant part of the working class, the sector of Catalan society most resistant to nationalism, by ignoring other social problems