9. Conclusions

This book has explored the Spanish constitutional debates of the nineteenth and the twentieth centuries joining the perspectives of political philosophy, conceptual history, and parliamentary history. As research, it has aimed to answer how political philosophy arguments in the parliamentary deliberations inspired conceptual changes and informed the design of state institutions. In each constitutional debate, political representatives debated about every aspect of the Constitution. By doing so their deliberations often led to conceptual innovations and pervasive institutional reforms. Constitutional debates played a determinant role in renewing the political vocabulary of Spain. That process affected concepts such as ‘sovereignty’, ‘constituent power’, ‘constituted power’, ‘sovereignty’, ‘reform’, ‘self-rule’, ‘self-determination’, ‘nation’, and ‘nationalities’.