ABSTRACT
This chapter presents the evolution of the Catalan demands in terms of legality and legitimacy from the right to self-determination towards the so-called right to decide'. The right to decide', as far as it is understood by most political actors in Catalonia, seeks to hold a referendum on independence based on the principle of democracy. In other words, the principle of democracy in conjunction with the principle of political pluralism might work better in a parliamentary democracy, especially in proportional and multiparty electoral systems such as the Catalan one. Excessive public mobilisation can carry democratic problems, legal problems, economic problems and social problems. Secessionist and sovereignist movements had traditionally invoked the principle of nationality and the principle and the right of people's to self-determination. Competing in the elections of 27 September 2015 with the aim of achieving the independence of Catalonia expressed in their manifestos and campaigns, the secessionist parties obtained the absolute majority of seats in the Catalan Parliament.
