Sweden

The Swedes who emerged into history were a seafaring people of the eastern Scandinavian coast, and during the Viking Age their genius lay less in the western raiding associated with their Danish and Norwegian neighbours than in trade and travel toward the east. From the eighth century the island town of Birka, on Björkö in Lake Mälaren, grew into one of the foremost trading settlements of the Baltic world, an entrepôt linked through the rivers of what is now Russia to Novgorod, the Black Sea, Constantinople and the markets of the Abbasid Caliphate. Swedish Norsemen, known in the east as Varangians or Rus, gave their name to the lands they crossed and traded silver, furs and slaves along the great river roads.

It was at Birka that Christianity first reached the Swedes. Around 829–831 the Frankish missionary Ansgar, sent from the emperor's court, established at Birka the earliest known Christian congregation in Sweden, though the new faith took hold only slowly and the old gods were worshipped at the great temple of Uppsala for generations more. Conversion was a long, uneven process spanning the tenth and eleventh centuries, advancing through royal patronage and resisted in the pagan heartlands until Christianity finally prevailed across the kingdom by the twelfth century.

Behind the traders and missionaries a kingdom slowly coalesced from the rival peoples of the Svear, around Lake Mälaren, and the Götar to the south. The process was gradual and the sources thin, but by the high Middle Ages a single Christian realm of Sweden had taken shape, its kings crowned, its bishoprics established and its place among the Christian monarchies of Europe assured. Birka itself, however, did not survive the transition: the town was abandoned in the late tenth century, its role passing to Sigtuna and later to the rising town of Stockholm.

Turning points

1. c. 750–970Economy & Trade

   The trading town of Birka

   Birka on the island of Björkö in Lake Mälaren flourished as a key Baltic trading settlement, connecting Scandinavia by river route to the Byzantine Empire and the Islamic world, before its abandonment in the late tenth century.

   ↗See the data

   [3] [1]

2. c. 829–831Religion

   Ansgar's mission and the first Christian congregation

   The Frankish missionary Ansgar founded at Birka the earliest known Christian congregation in Sweden, the first organised Christian presence among a still largely pagan people.

   [3] [1]

3. 9th–11th c.Peoples & Migration

   The Rus and the eastern river routes

   Swedish Norsemen, called Varangians or Rus, opened and dominated the river trade routes east through Ladoga and Novgorod toward Constantinople and Baghdad, exchanging furs, silver and slaves.

   ↗See the data

   [3] [1]

4. c. 1008Religion

   Christianization advances under royal patronage

   The conversion of the Swedes proceeded through the eleventh century by way of baptised kings and the founding of churches, even as paganism endured at the temple of Uppsala until the faith finally prevailed.

   [1]

Figures of the era

In the summer of 1397 the formidable Queen Margaret of Denmark gathered the nobles of Denmark, Norway and Sweden at Kalmar in south-eastern Sweden and joined the three kingdoms under a single monarch, her grandnephew Erik of Pomerania. The Kalmar Union was meant to present a united Scandinavian front against German encroachment, with each realm keeping its own laws. In practice power gravitated to Denmark, and the arrangement bred resentment almost from the start: Swedish nobles found royal authority concentrated, new taxes levied, and castles and fiefs handed to Danish favourites rather than to themselves.

The fifteenth century was therefore an age of recurring Swedish revolt against the union and its Danish kings. Regents of the Sture family governed Sweden for long stretches in defiance of the crown, and the country drifted in and out of the union it never wholly accepted. The crisis came under King Christian II of Denmark. Having defeated the regent Sten Sture the Younger and entered Stockholm, Christian had himself crowned and promised amnesty to his Swedish opponents, only to turn on them: over three days in November 1520 some eighty-two nobles, clergy and burghers were condemned as heretics and executed in the Stockholm Bloodbath.

The massacre was a catastrophic miscalculation. Among the dead were the father and kinsmen of the young nobleman Gustav Eriksson Vasa, who raised the province of Dalarna in revolt and built a peasant army that drove the Danes from Sweden. The Estates declared him regent and then, on 6 June 1523, elected him king. The Kalmar Union was dissolved for good, and the act is taken as the founding of the modern Swedish state.

Turning points

1. Jun 1397Politics & Power

   Formation of the Kalmar Union

   Queen Margaret united Denmark, Norway and Sweden under one monarch, her grandnephew Erik of Pomerania, creating a Scandinavian union intended to resist German power but soon dominated by Denmark.

   [4] [5]

2. 15th c.Politics & Power

   Swedish revolts and the Sture regents

   Resentment of Danish dominance and of taxes and offices given to royal favourites fuelled recurring Swedish risings, with regents of the Sture family ruling Sweden in defiance of the union crown.

   [5] [1]

3. 8–10 Nov 1520War & Rupture

   The Stockholm Bloodbath

   After capturing Stockholm and breaking his promise of amnesty, King Christian II of Denmark had some eighty-two Swedish nobles, clergy and citizens condemned as heretics and executed, including Gustav Vasa's father.

   ↗See the data

   [6] [7]

4. 1521–1523War & Rupture

   The Swedish War of Liberation

   Gustav Vasa raised Dalarna in revolt against Christian II, leading a peasant army that expelled the Danes and was declared regent of Sweden, ending Danish control of the realm.

   ↗See the data

   [8] [2]

5. 6 Jun 1523Formation

   Gustav Vasa elected king

   The Estates meeting at Strängnäs elected Gustav Vasa king of Sweden, dissolving the Kalmar Union and founding the hereditary Vasa monarchy that is regarded as the start of the modern Swedish state.

   [8] [9] [2]

Figures of the era

Gustav Vasa came to a throne that was poor, indebted to the merchants of Lübeck who had aided his rising, and only loosely governed. His response was to centralise power as no Swedish king had before. He suppressed regional revolts, reorganised the royal finances and administration, and in 1544 persuaded the Estates to make the crown hereditary in his house, ending the old principle of election and securing the Vasa dynasty. By his death in 1560 he had transformed a fractured realm into a coherent national monarchy.

The decisive instrument of this consolidation was religious. At the parliament held at Västerås in 1527 Gustav Vasa carried through Sweden's break with Rome: the property of the Catholic Church was transferred to the crown, the king assumed control of church administration, and preaching was to be in Swedish. The reforms gave him both vast new revenues and a Church subordinate to the state. Under the guidance of the reformers Olaus and Laurentius Petri, Lutheran doctrine spread; Laurentius became Sweden's first Lutheran archbishop in 1531, and the complete Swedish Bible was printed in 1541, a landmark of the language and of popular literacy.

The later sixteenth century was unsettled by the rivalries of Gustav Vasa's sons and by religious tension, including the brief Catholic sympathies of King John III and the deposition of the Catholic Sigismund. Stability returned with Charles IX, who secured the Lutheran settlement and the succession. When he died in 1611 he left the throne to his young son Gustavus Adolphus, the king under whom Sweden would step onto the European stage.

Turning points

1. 1523–1560Politics & Power

   Reign of Gustav I Vasa

   Gustav Vasa built a centralised national monarchy, restored royal finances, suppressed revolts and founded the Vasa dynasty, ruling for nearly four decades as the architect of the modern Swedish kingdom.

   [8] [2]

2. 1527Religion

   The Reformation at Västerås

   At the Riksdag of Västerås, Gustav Vasa broke with Rome, transferred the Catholic Church's property to the crown and took control of church administration, beginning Sweden's transformation into a Lutheran state.

   [10] [9] [2]

3. 1541Culture & Ideas

   The complete Swedish Bible

   The first full Bible in Swedish, the work of the reformers Olaus and Laurentius Petri, was printed, advancing the Lutheran cause and shaping the Swedish written language and popular literacy.

   [10]

4. 1544Politics & Power

   The crown made hereditary

   The Estates declared the Swedish crown hereditary in the Vasa line, ending the older elective principle and entrenching the dynasty's hold on the throne.

   [2]

Figures of the era

The 'age of greatness', the Stormaktstiden, opened with the accession of Gustavus Adolphus in 1611 and the rise of Sweden from a regional kingdom to a European great power. A brilliant soldier and reformer, Gustavus Adolphus modernised the army and the state, and in July 1630 he landed in Pomerania to enter the Thirty Years' War on the Protestant side. His intervention reversed the fortunes of a cause near defeat and won a string of victories before he was killed at the Battle of Lützen in 1632. His chancellor Axel Oxenstierna and a line of able generals carried the war on, and at the Peace of Westphalia in 1648 Sweden secured Western Pomerania, Bremen and Verden, a seat in the imperial diet and mastery of the German river mouths and the Baltic.

Sweden's expansion continued against Denmark. In the Second Northern War, Charles X Gustav marched his army across the frozen belts and forced Denmark to its knees; by the Treaty of Roskilde of 26 February 1658 Denmark ceded the rich provinces of Scania, Blekinge and Halland, together with Bohuslän and other lands, giving Sweden the natural southern frontier it holds to this day. At its height the Swedish empire encircled the Baltic, holding Finland, Estonia, Livonia, Ingria and possessions in northern Germany; for a few decades the sea was very nearly a Swedish lake.

The empire rested on a narrow demographic and economic base, and it was overstretched. Under Charles XII it faced a coalition of Russia, Denmark and Saxony-Poland in the Great Northern War. The young king won early and dazzling victories, but his invasion of Russia ended in disaster: at Poltava, in Ukraine, on 27 June 1709 Peter the Great destroyed the main Swedish army, breaking Sweden's power and confirming Russia's rise. The war dragged on until the Treaty of Nystad in 1721 stripped Sweden of its Baltic provinces and left it a much-reduced kingdom. The age of greatness was over.

Turning points

1. Jul 1630War & Rupture

   Sweden enters the Thirty Years' War

   Gustavus Adolphus landed in Pomerania and intervened on the Protestant side, turning the tide of the Thirty Years' War with a series of victories before his death at Lützen in 1632.

   ↗See the data

   [11] [2]

2. 1648Politics & Power

   Peace of Westphalia

   The settlement ending the Thirty Years' War granted Sweden Western Pomerania, Bremen and Verden and a vote in the imperial diet, confirming it as a dominant power on the Baltic and in northern Germany.

   [11]

3. 26 Feb 1658War & Rupture

   Treaty of Roskilde

   After Charles X Gustav's invasion of Denmark, the Treaty of Roskilde forced Denmark to cede Scania, Blekinge, Halland and Bohuslän to Sweden, fixing its southern border and marking the empire's territorial peak.

   ↗See the data

   [12]

4. 27 Jun 1709War & Rupture

   Battle of Poltava

   Peter the Great of Russia routed Charles XII's invading army at Poltava in Ukraine, a decisive defeat that broke Swedish military power and began Russian supremacy in eastern Europe.

   ↗See the data

   [13]

5. 30 Aug 1721Politics & Power

   Treaty of Nystad ends the empire

   The peace ending the Great Northern War ceded Sweden's Baltic provinces — Estonia, Livonia, Ingria and part of Karelia — to Russia, ending the age of greatness, though Finland was restored to Sweden.

   [14] [13]

Figures of the era

The eighteenth century brought Sweden the 'Age of Liberty', when power shifted from the crown to the Riksdag and party politics flourished, followed by the royalist reaction of Gustav III. But the great rupture came in the Napoleonic era. In 1808–09 Russia invaded Finland, which had been an integral part of the realm for centuries, and by the Treaty of Fredrikshamn (Hamina) of 17 September 1809 Sweden ceded the whole of Finland and the Åland Islands to the Russian tsar. The loss of roughly a third of the kingdom's territory and population was a national trauma; it also prompted a new constitution at home, the Instrument of Government of 1809, which curbed royal power.

Compensation came in the west. The childless king was succeeded by an unexpected heir: the French marshal Jean-Baptiste Bernadotte, elected Swedish crown prince in 1810 and ruling from 1818 as Charles XIV John, founder of the dynasty that reigns still. Having joined the coalition against Napoleon, Sweden took Norway from Denmark by the Treaty of Kiel of 14 January 1814. The Norwegians resisted, drafting their own constitution, and the result was not annexation but a personal union of two kingdoms under one king, which lasted from 1814 until 1905. From 1814 Sweden also fought no more wars; under Charles XIV John it adopted the policy of neutrality and non-alignment that would define its foreign relations for two centuries.

The nineteenth century was an age of peace, reform and profound social change. Industry and railways transformed the economy, the Riksdag was modernised, and the franchise slowly widened. Yet rural poverty and rapid population growth also drove one of the great migrations of the era: between the 1840s and the 1920s roughly 1.3 million Swedes emigrated, the overwhelming majority to the United States, settling above all in the upper Midwest. The union with Norway, never wholly comfortable, was dissolved peacefully in 1905 after negotiations at Karlstad, a settlement later praised as a model of how to part without war.

Turning points

1. 17 Sep 1809War & Rupture

   Treaty of Fredrikshamn: the loss of Finland

   Ending the Finnish War, the Treaty of Fredrikshamn (Hamina) ceded the whole of Finland and the Åland Islands to Russia, stripping Sweden of about a third of its territory and people.

   ↗See the data

   [15] [1]

2. 1810Politics & Power

   Bernadotte chosen as heir

   The French marshal Jean-Baptiste Bernadotte was elected Swedish crown prince, founding the Bernadotte dynasty; he ruled from 1818 as Charles XIV John, king of Sweden and Norway.

   [16] [1]

3. 14 Jan 1814Politics & Power

   Treaty of Kiel and the union with Norway

   Denmark ceded Norway to Sweden by the Treaty of Kiel; Norwegian resistance produced not annexation but a personal union of the two kingdoms under one crown, lasting until 1905.

   [16] [17]

4. 1840s–1920sPeoples & Migration

   The great emigration to America

   Driven by rural poverty and population growth, roughly 1.3 million Swedes emigrated, chiefly to the United States, in one of the largest population movements of the age, reshaping Swedish society at home.

   ↗See the data

   [18]

5. 1905Independence

   Peaceful dissolution of the union with Norway

   After Norway's parliament declared the union dissolved, Sweden agreed at Karlstad to a peaceful separation, recognising Norwegian independence without war in a settlement held up as a diplomatic model.

   ↗See the data

   [17]

Figures of the era

In the first half of the twentieth century Sweden completed its democratic transition and, by staying out of war, was able to devote its energies to social transformation. Universal and equal suffrage was achieved between 1918 and 1921, and the Social Democrats, dominant for most of the century, set about building the folkhemmet, the 'people's home' first invoked by Per Albin Hansson in 1928: a vision of society as a good home founded on equality and care, which became the basis of the comprehensive, universal welfare state for which Sweden is renowned. Through the Second World War Sweden maintained a much-criticised but successful neutrality, trading with Nazi Germany while sheltering refugees, and emerged unoccupied and intact.

Neutrality, first proclaimed under Charles XIV John in 1814, became the cornerstone of Swedish identity in the Cold War. The doctrine of 'non-aligned in peace, neutral in wartime' kept Sweden out of NATO and the Warsaw Pact alike, though it quietly maintained ties with the West and built a formidable national defence and arms industry. After the Soviet collapse, neutrality loosened: Sweden joined the European Union on 1 January 1995, while declining to adopt the euro, and deepened its partnership with NATO without joining the alliance.

The decisive break came with Russia's full-scale invasion of Ukraine in February 2022, which overturned the assumptions of Swedish security policy. Together with Finland, Sweden applied to join NATO, abandoning more than two hundred years of military non-alignment. After Turkish and Hungarian ratification was finally secured, Sweden deposited its instrument of accession in Washington and on 7 March 2024 became NATO's thirty-second member, brought at last under the collective defence of Article 5 — one of the most consequential reversals in the country's modern history.

Turning points

1. 1918–1921Politics & Power

   Universal suffrage and democracy

   Sweden completed its democratic transformation, introducing universal and equal suffrage for men and women, as the Riksdag rather than the crown became the centre of political power.

   [9] [19]

2. 1928Politics & Power

   The 'people's home' (folkhemmet)

   Per Albin Hansson set out the vision of Sweden as a folkhemmet, a good home built on equality and mutual care, which the Social Democrats made the foundation of the modern welfare state.

   [19]

3. 1939–1945War & Rupture

   Neutrality in the Second World War

   Sweden preserved its neutrality through the Second World War, remaining unoccupied while continuing controversial trade with Germany and offering refuge to those fleeing Nazi persecution.

   ↗See the data

   [19] [1]

4. 1 Jan 1995Politics & Power

   Accession to the European Union

   After the end of the Cold War made strict neutrality obsolete, Sweden joined the European Union, while choosing to keep its own currency rather than adopt the euro.

   [19] [1]

5. 7 Mar 2024Politics & Power

   Sweden joins NATO

   Prompted by Russia's invasion of Ukraine, Sweden abandoned over two centuries of non-alignment and became NATO's 32nd member on 7 March 2024, gaining the protection of Article 5.

   [20] [21]

Figures of the era