Spain

The Iberian Peninsula has been inhabited since the Paleolithic, with notable prehistoric remains such as the Altamira cave paintings dating to roughly 36,000 years ago. By the first millennium BCE, the territory was home to Iberian and Celtic peoples, alongside Phoenician, Greek, and Carthaginian coastal colonies that traded across the western Mediterranean. Roman legions arrived during the Punic Wars and gradually conquered the peninsula, organising it as Hispania, which became one of the most thoroughly Romanised provinces of the empire and produced emperors including Trajan and Hadrian. Following the collapse of Roman authority in the fifth century, the Visigoths established a kingdom centred on Toledo that endured until 711, when an Umayyad army crossed from North Africa and rapidly subdued most of the peninsula.

For nearly eight centuries, Iberia was divided between Muslim al-Andalus, with its cultural high points in Cordoba and Granada, and a patchwork of Christian kingdoms in the north, principally Asturias, Leon, Castile, Navarre, Aragon, and Portugal. The long process known as the Reconquista saw the southward expansion of these Christian polities, culminating in the dynastic union of Isabella I of Castile and Ferdinand II of Aragon in 1469. Their joint reign brought the conquest of Granada and the expulsion of Jews in 1492, the same year Christopher Columbus reached the Americas under Castilian sponsorship, opening an era of overseas empire.

Under the Habsburg dynasty in the sixteenth and seventeenth centuries, Spain became a global power whose silver fleets and tercios shaped European politics, although successive wars, fiscal strain, and the loss of the Netherlands and Portugal eroded its primacy. The Bourbon succession, confirmed by the War of the Spanish Succession (1701 to 1714), introduced centralising reforms modelled on France. The nineteenth century was turbulent: Napoleonic occupation provoked the Peninsular War and the 1812 Cadiz Constitution, most American colonies achieved independence by the 1820s, Carlist civil wars recurred, and the remnants of empire (Cuba, Puerto Rico, and the Philippines) were lost to the United States in 1898.

The twentieth century opened under a constitutional monarchy that gave way to the dictatorship of Miguel Primo de Rivera in 1923 and then to the Second Republic in 1931. A military uprising in July 1936 ignited the Spanish Civil War, which ended in 1939 with the victory of Nationalist forces under General Francisco Franco. Franco ruled as caudillo until his death in 1975, keeping Spain neutral in the Second World War and gradually opening the economy from the 1950s onward, though political life remained authoritarian.

After Franco's death, King Juan Carlos I oversaw a peaceful transition to democracy, ratified by the 1978 Constitution, which established a parliamentary monarchy with extensive autonomy for the country's regions. Spain joined NATO in 1982 and the European Communities in 1986, and adopted the euro in 1999. The early twenty-first century has been marked by the 2004 Madrid train bombings, the 2008 financial crisis and subsequent austerity, and a constitutional confrontation with the Catalan independence movement in 2017. In 2014, Juan Carlos abdicated in favour of his son Felipe VI, the current head of state.

Spain today is a parliamentary constitutional monarchy organised as a state of seventeen autonomous communities and two autonomous cities, with executive power exercised by a Prime Minister responsible to the bicameral Cortes Generales.