Constitutional identity in discussion without changing Constitution?: territorial model in Spain

In Spain, formal processes to reform the 1978 Constitution has been scarcely used, and only to implement European treaties (1992) and to attain economic objectives of the European Union (2011).  In such context, invariability and immutability of the constitutional text seems to become a defining characteristic of that constitutional identity. Based on the incrementalism model-approach, this contribution critically assesses the foundations and the reality of the continuity or stability of constitutional identity, focusing in the core values established in the constitutional preamble in order to protect all Spaniards and peoples of Spain in the exercise of human rights, of their cultures and traditions, and of their languages and institutions. The main hypotheses points on the strengthen unity under the constitutional openness of the territorial model and its effects on collective democratic demands and  human rights associated.