The constitutional history of Spain dates back to the constitution of 1812. In June 1976, Spain’s new King Juan Carlos dismissed Carlos Arias Navarro and appointed the reformer Adolfo Suárez as Prime Minister. The resulting general election in 1977 convened the Constituent Cortes (the Spanish Parliament, in its capacity as a constitutional assembly) for the purpose of drafting and approving the constitution of 1978. After a national referendum on 6 December 1978, 88% of voters approved of the new constitution – a culmination of the Spanish transition to democracy.
As a result, Spain is now composed of 17 autonomous communities and two autonomous cities with varying degrees of autonomy thanks to its Constitution, which nevertheless explicitly states the indivisible unity of the Spanish nation. The constitution also specifies that Spain has no state religion and that all are free to practice and believe as they wish.
The Spanish administration approved the Gender Equality Act in 2007 aimed at furthering equality between genders in Spanish political and economic life. According to Inter-Parliamentary Union data as of 1 September 2018, 137 of the 350 members of the Congress were women (39.1%), while in the Senate, there were 101 women out of 266 (39.9%), placing Spain 16th on their list of countries ranked by proportion of women in the lower (or single) House. The Gender Empowerment Measure of Spain in the United Nations Human Development Report is 0.794, 12th in the world.