From poverty to prosperity, Brussels put up the cash and Spaniards brought the ideas.
Spain would normally have been celebrating its 30th anniversary as a member of the European Union in 2016, but a sombre note hangs over this landmark year as the country reflects on issues threatening the 'club', including the Brexit vote and increasing anti-EU sentiments in France, The Netherlands and elsewhere.
One-time vice-president of the European Commission, Spaniard Manuel Marín, who helped convince the other then-member-States to allow his native country to join said he was one of the student diplomats at the College of Europe in Bruges, Belgium, in 1973. They were taken on day one to a ceremony housing the bodies of those who perished in World War II and reminded that this was the very reason the European Union existed.
Now, though, Spain is reflecting on a mixed history as a member-State. Austerity measures imposed by Brussels in light of national debts have caused hardship in Spain and the country has narrowly escaped being fined for its continued, consistent failure to meet deficit targets and the lucrative trade agreement and political community has been shaken to the core by the Brexit vote and the rising of the far right in some member-States.
Bureaucracy and very high expenses for MEPs and Commissioners, have come into question throughout, although most member-States believe this can only be influenced by those who have a seat at the table; that is, each of the national leaders who make up the Council of Europe.
De Gaulle in 1944 said "Spain can join when they get rid of Franco."
Three decades ago, joining the then European Economic Community (EEC), which would become the EU, was the launch-pad Spain needed to repair itself. It was still a very poor country, with levels of illiteracy far higher than in any other civilised western country and had only known democracy for a decade after having been under a dictatorship spanning more than 40 years.
The country's morale was given a sharp upwards push as its social and economic conditions went from strength to strength, achieving a drastic transformation in a relatively short time.
Nowadays, the EU is a far cry from that which was designed by Altiero Spinelli, an Italian reporter exiled to Venice Island after challenging the iron-fisted reign of Franco's ally, Benito Mussolini. Spinelli wrote an open letter calling for a federal, united, but free Europe, in response to the mass killings he witnessed during the height of World War II and this letter would form the basis to the European Coal and Steel Community, later to become the EEC and then the EU.
Spinelli wanted to see Europe becoming a 'united international force', ending nationalism and totalitarianism in individual States and protecting human rights, as a way of preventing a possible future World War III, given that the 1939-1945 conflict had left the equivalent of today's entire UK population dead in just six years.
Spinelli's idea was supported by the French Resistance, since President Charles de Gaulle and prominent diplomat Pierre Mendès France had decided to try to set up a 'European union' of France, Belgium, The Netherlands and Italy. They said Spain would be asked to join them 'once they had got rid of Franco'.
It would take another 30 years, however, before Spain 'got rid of' its dictator, which only really happened when he died.
Back in Franco's time, the European Union as it was then, was symbolic of freedom from censorship and social and professional liberty. In fact, ex-European Parliamentary speaker José María Gil Robles says Spain used to be 'quite jealous of' students in universities elsewhere on the continent who were able to live as they wished and voice their opinions without reprisal.
Although polls seem to hint that a third of left-wing voters believe the EU has harmed Spain in recent years more than it has benefited the country, the idea of a 'Spexit' remains unthinkable.
Spain has enjoyed EU funding allowing it to improve its infrastructure and the country firmly believes the responsibility for the smooth running of the EU lies with each and every member-State, meaning that if any one of the current 28 is unhappy with the way it is working, they must take part of the blame for it.
Spain also recalls that the usefulness or otherwise of the EU to a country is dependent upon what each country, Spain included, contributes; not just financially, but in terms of ideas.
From A Poor Farming Nation To A Thriving Western State
Back in 1986, when Spain became a fully-paid-up member, two-thirds of workers were in the agricultural sector and had no Social Security provisions, meaning no State pension or sick pay. Rural dwellers often had no electricity or running water, relying on wells.
Just 10 years previously, its black-and-white TV only had one, State-controlled, channel which lauded Franco in every programme and by the time of its EU entry, still only had two channels.
Roads were potholed, cracked, dangerous and often missing. Motorways did not start to appear until the 1980's or 1990's and its GDP was less than half the EU average.
The Difference In 30 Years Is Palpable
Mobile phone and internet signals are available everywhere in the country, with 4G and fibre optic beginning to roll out in more developed areas.
Exports have increased by 800% since 1986.
State pensions provide a liveable wage.
Laws covering human rights and equality including same-sex marriage and adoption and protection for domestic violence victims are set in stone.
Spain's largest companies have a top international presence - the Chairman of Inditex, the country's biggest clothing chain, is the richest man in Europe.
14,000 kilometres of major highways today are a far cry from the 483 kilometres of 1986 and whilst its 2,500 kilometres of fast rail links remain insufficient to connect the country's most populous areas, the quality of trains and efficient level of service are among the best in Europe.
(Part II next month)