The 20th century initially brought little peace; colonisation of Western Sahara, Spanish Morocco and Equatorial Guinea was attempted as a substitute for the loss of the Americas. A period of dictatorial rule (1923-1931) ended with the establishment of the Second Spanish Republic. The Republic offered political autonomy to the Basque Country and Catalonia and gave voting rights to women. However, with increasing political polarisation and pressure from all sides, coupled with growing and unchecked political violence, the Republic ended with the outbreak of the Spanish Civil War in July 1936. Following the victory of the nationalist forces in 1939, General Francisco Franco ruled a nation exhausted politically and economically until his death in 1975.
Under the Bonaparte, Spain failed to embrace the mercantile and industrial revolutions of the 18th century, and also failed to absorb the ideals that of the Enlightenment that were revolutionizing European thought. These missed opportunities, combined with the economic failures of the 17th century, caused the country to fall desperately behind Britain, France, and Germany in economic and political power.
Through a policy of alliances with other European nobility and the conquest of most of South America and the West Indies, Spain began to establish itself as an empire. The Treaty of Tordesillas, negotiated by Pope Alexander VI between Portugal and Spain, effectively divided up the non-European world between these two budding empires. Massive amounts of gold and silver were imported from the New World into Spain's coffers. However, in the long run this hurt the Spanish economy much more than it helped it. The bullion caused high inflation rates, which undermined the value of Spain's currency. Additionally, Spain became dependent on her colonies for income, and when Queen Elizabeth I of England began to capture Spanish vessels on the way to and from the New World, Spain suffered massive economic losses. These effects, combined with the expulsion of Spain's most economically vital classes in the late 15th century (the Jews and the Moors), caused Spain's economy to collapse several times in the 16th century, bringing the Golden Age of Spain to a close.
Philip V, the first Bourbon king, of French origin, signed the Decreto de Nueva Planta in 1715, a new law that revoked most of the historical rights and privileges of the different kingdoms that conformed the Spanish Crown, unifying them under the laws of Castile, where the Cortes had been more receptive to the royal wish. Spain became culturally and politically a follower of France. The rule of the Spanish Bourbons continued under Ferdinand VI and Charles III. His son Carlos IV was truly incompetent (some say mentally handicapped), and under his reign Spain fell to the armies of Napoleon.
In the 1960s, more than a decade later than other western European countries, Spain began to enjoy economic growth and gradually transformed into a modern industrial economy with a thriving tourism sector. Growth continued well into the 1970s, with Franco's government going to great lengths to shield the Spanish people from the effects of the oil crisis.
In 1898 Spain lost the Spanish-American War. Cuba gained its independence, and Spain lost its remaining New World colonies—Guam, the Philippines, and Puerto Rico—to the United States. Spain's colonial possessions were reduced to Spanish Morocco, Western Sahara and Equatorial Guinea.
As the Roman empire declined, the Suebi, Vandals and Alans each took control of part of Hispania. In the 5th century AD the Visigoths, a romanized germanic tribe, conquered all of Hispania and established a relatively stable kingdom lasting until 711, when it fell to an invasion by Islamic North African Moors and became part of the expanding Umayyad empire, under the name of Al-Andalus. When the Umayyad empire gave way to the Abbaside empire, an Umayyad exile established the Caliphate of Cordoba, effectively making Al-Andalus independent from the empire.
Spanish rule in Morocco ended in 1956. Though militarily victorious in the 1957-1958 Moroccan invasion of Spanish West Africa, Spain gradually relinquished its remaining African colonies. Spanish Guinea was granted independence as Equatorial Guinea in 1968, while the Moroccan enclave of Ifni had been ceded to Morocco in 1969.
As recently as the mid-20th-century, much of Spain (especially outside of the major cities) remained quite distinct from the rest of Europe. In 1954, V.S. Pritchett could still write of small Spanish towns, "The inn, if there is one, will not be a hotel, nor even a fonda — the Arab word — but perhaps a posada: a place one can ride into with a mule or a donkey, where one can stable an animal and lie down oneself on a sack of straw, the other side of the stall." [Pritchett, 1954 p. 46-47] However, especially since the 1975 death of Francisco Franco, Spain has become increasingly European; Pritchett's rustic posada would be unimaginable today.
According to the latest official poll, 80% of Spaniards self-identify as Catholic, 12% as non-believer, and 1% as other (the remaining 7% declined to state). Of the 1.4% identifying as other, 29% identified as Evangelical Christian, 26% as Jehovah's Witnesses and 3% as Muslim (the rest either mentioned smaller religions or declined to state). According to the same poll, 73% believe in God, 14% don't and 12% are unsure (1% declined to state). Additionally, according to this poll, only 41% believe in Heaven. 24% of the Spaniards think that the Bible is just a fable. Only 25% of Catholics go to church at least once a week.
The original peoples of the Iberian peninsula (in the sense that they are not known to have come from elsewhere), consisting of a number of separate tribes, are given the generic name of Iberians. This may have included the Basques, the only pre-Celtic people in Iberia surviving to the present day as a separate ethnic group. The most important culture of this period is that of the city of Tartessos. Beginning in the 9th century BC, Celtic tribes entered the Iberian peninsula through the Pyrenees and settled throughout the peninsula, becoming the Celt-Iberians.
The Castilian-derived Spanish (called both Español and Castellano in the language itself) is the official language throughout Spain, but other regional languages are also spoken. Without mentioning them by name, the Spanish Constitution recognizes the possibility of regional languages being coofficial in their respective autonomous communities.
Spain was part of the Roman Empire and many areas of Spain retain significant Roman architectural remnants. The Roman aqueduct at Segovia is still in use as of 2004; Mérida, now the Extermaduran capital but once the capital of the Roman province of Lusitania, retains over 5 miles of its Roman aqueduct, Roman bridge over the River Guadiana, an arch of Trajan, and significant remnants of a Roman forum, amphitheatre, and a temple popularly accounted to have been dedicated to Diana (goddess). Another Roman bridge crosses the Tagus River at Alcántara. Lesser Roman ruins can be found in the heart of Barcelona.
Modern Spain began to take form during the Reconquista, the struggle between the Christian kingdoms arising in the northern regions left unconquered by the Moors and the Muslim kingdoms into which Al-Andalus eventually split.