Abstract
The party systems which have developed in Catalonia and the Basque Country since Franco's death are distinguished from the Spanish one, and also from each other, in three areas: the leading role of the largest nationalist member of each; the secondary one of Spain's ruling Socialist Party; and the presence of smaller nationalist parties. Analysis of these three factors shows that, despite appearances, the systems’ initial structures did indeed reflect the historical nature of nationalism in the two regions. It also indicates how the dynamics of competition within them have in turn affected the nature of contemporary nationalism.