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NotesHistory HLTopic 18.5The New World, Indian Ocean, Tordesillas and the Impact on Europe
Back to History HL Topics
18.5.24 min read

The New World, Indian Ocean, Tordesillas and the Impact on Europe (History HL)

IB History • Unit 18

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Contents

  • Exploration and the New World
  • Exploration and the Indian Ocean
  • The Treaty of Tordesillas (1494) and Impact on Europe to 1550
What is 'the New World'?: When Columbus reached the Caribbean in 1492, Europeans called the Americas the 'New World' — lands entirely unknown to them before. The term stuck and shaped how Europeans thought about what they had found.

Columbus did not find a route to Asia as he hoped. He found something far more significant: two continents stretching from the Arctic to the Antarctic. His four voyages (1492–1504) mapped Caribbean islands, parts of Central America and the Venezuelan coast. Columbus himself believed he had reached islands off Asia, but other navigators quickly realised the truth. Amerigo Vespucci sailed south American coasts in 1499–1502 and published accounts arguing these were previously unknown continents — giving his name to 'America'.

Significance of New World Exploration

  • Geographic revolution — Europeans had to rewrite their understanding of the world; maps produced after 1492 look completely different from medieval ones
  • Opening of Atlantic routes — Spain gained access to vast new lands and eventually enormous wealth from silver mines (Potosí, from 1545)
  • Rivalry between powers — other European states — France, England, later the Dutch — were spurred to seek their own Atlantic possessions
  • Demographic catastrophe for indigenous peoples — European diseases killed millions of Native Americans, reshaping the demographic balance permanently
  • New trade goods — maize, potatoes, tomatoes, cacao and tobacco began their long journey into European diets and economies

Consequences for European States

Spain (direct beneficiary)

  • Gained formal empire in the Caribbean, Mexico (1519–21) and Peru (1532–35) under Cortés and Pizarro — though these conquests mostly fall after 1550
  • Rapid inflow of silver and gold, fuelling Castilian crown revenues and European prices
  • Became the dominant Atlantic power; other states envied and competed with her
  • Had to govern and justify conquest — giving rise to debates about indigenous rights (Las Casas, Sepúlveda)

Other European States

  • Portugal's route to the Indian Ocean was partly motivated by avoiding Spanish Atlantic dominance
  • France sponsored John Cabot — actually Cabot sailed for England; France later sent Cartier (1534) to North America
  • England sent John Cabot (1497) to Newfoundland — an early claim that generated little immediate benefit but planted future imperial ambitions
  • Economic disruption: Atlantic trade began displacing traditional Mediterranean commerce, slowly shifting Europe's economic centre of gravity northward and westward
Name the individuals: Paper 3 questions on the New World expect you to name Columbus, Vespucci and (for English claims) John Cabot. Avoid vague statements like 'explorers discovered America' — always attribute the action to a named person with a date.

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While Spain looked westward, Portugal pursued a different strategy: sailing east around Africa to reach the spice islands of Asia directly. This was the culmination of decades of Portuguese effort begun under Henry the Navigator and built step by step along the African coast.

1

Bartolomeu Dias (1488)

Rounded the Cape of Good Hope — proving that Africa had a southern tip and that a sea route to the Indian Ocean was possible. This was the critical breakthrough.

2

Vasco da Gama (1497–99)

Sailed from Lisbon around Africa, crossed the Indian Ocean with the help of an Arab pilot, and arrived in Calicut (India). He returned with a cargo of spices worth 60 times the voyage's cost.

3

Pedro Álvares Cabral (1500)

On a second voyage to India, blown westward and landed in Brazil — accidentally adding South America to Portugal's claims. Then continued to India, cementing the route.

4

Alfonso de Albuquerque (1509–15)

Built a Portuguese empire in the Indian Ocean: captured Goa (1510), Malacca (1511) and Hormuz (1515). Portugal controlled the ocean's key chokepoints.

Dias opened the door — da Gama walked through it — Cabral found Brazil by accident — Albuquerque locked in control.

Significance

The Indian Ocean route was enormously significant. Portugal broke the Venetian monopoly on the European spice trade. Spices — pepper, cinnamon, nutmeg, cloves — were among the most valuable goods in the world, used for food preservation, medicine and flavouring. By sailing directly to the source, Portugal could buy cheaply in Asia and sell at high profit in Lisbon and Antwerp, cutting out Muslim and Venetian middlemen.

Why does the Indian Ocean route matter to European history?: Before da Gama, the overland spice route ran through the Ottoman Empire and the eastern Mediterranean, generating huge revenues for Muslim rulers and Venetian merchants. Portugal's direct sea route collapsed the price advantage of the land route and damaged Venice's position as Europe's trading hub. It also demonstrated that any European nation with ships and capital could bypass traditional trade systems — a model Spain, England, France and the Dutch would all imitate.

Consequences for European States

Portugal — wealth and empire

Became the richest nation in Europe for a generation. Lisbon replaced Venice as Europe's spice capital. The Portuguese crown earned vast customs revenues. By 1510 Portugal had an Indian Ocean empire stretching from Mozambique to Goa to Malacca.

Venice and the Ottoman Empire — decline

Venetian spice profits fell sharply after 1500. Venice tried to compete but could not match Portugal's direct access. The Ottoman Empire also lost transit-fee revenues. This gradual shift weakened the eastern Mediterranean's economic dominance.

Antwerp — new trade hub

Portuguese goods landed at Antwerp in the Low Countries, which became Europe's new commercial capital by c.1510. This shifted economic power northward, away from the Mediterranean.

Other European powers — inspiration

Spain, England and France all saw Portugal's success and sought their own routes. The Indian Ocean achievement proved long oceanic voyages were commercially viable — directly inspiring Atlantic ventures.

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The Treaty of Tordesillas (1494)

Columbus's return in 1493 immediately caused a diplomatic crisis. Both Spain and Portugal claimed the right to newly discovered lands — and their claims overlapped. Pope Alexander VI issued a papal bull in 1493 drawing a line 100 leagues west of the Cape Verde Islands, giving everything west to Spain and east to Portugal. Portugal objected that this was too generous to Spain.

What the Treaty actually said: In 1494, Spain and Portugal negotiated directly and moved the line to 370 leagues west of the Cape Verde Islands. Everything west of the line belonged to Spain; everything east belonged to Portugal. This is why Brazil (which Cabral reached in 1500, slightly east of the line) became Portuguese — and why the rest of the Americas became Spanish.
  • Significance — it divided the world — for the first time, two powers attempted to formally split the entire non-European world between themselves
  • Significance — it was legally enforced — backed by papal authority and accepted by both crowns; it shaped actual colonisation patterns for decades
  • Impact — Brazil became Portuguese — Cabral's 1500 landfall in Brazil fell east of the Tordesillas line, giving Portugal a South American colony
  • Impact — Spanish empire in the Americas — the vast landmass west of the line was assigned to Spain, underpinning the legal basis for Spanish conquest
  • Impact — other powers excluded — France, England and later the Dutch were not party to Tordesillas and ignored it, but it gave Spain and Portugal a legal framework to defend their monopolies
  • Impact — encouraged Portuguese eastward focus — knowing the Atlantic and Americas belonged to Spain, Portugal concentrated fully on the African and Asian routes

Economic Impact on Europe to 1550

The economic consequences of exploration built gradually but were transformative by 1550. Two processes dominate: the flow of bullion (gold and silver) into Europe, and the Columbian Exchange.

Economic changeCauseEffect on Europe by 1550
Increased gold supplyPortuguese West African gold trade; early Caribbean goldMore currency in circulation; stimulated trade but contributed to inflation
Silver flow from AmericasSpanish mines in Hispaniola; larger mines opened post-1545 (Potosí)Dramatic rise in silver supply; fuelled 'Price Revolution' — sharp inflation across Europe
Spice trade dominance by PortugalDa Gama's route bypassed Ottoman/Venetian middlemenCheaper spices in northern Europe; Antwerp boomed; Venice declined
New crops arriving in EuropeColumbian Exchange: maize, potatoes, tomatoes, cacaoGradual dietary transformation; potatoes would later feed northern Europe (impact mainly post-1550)
Shift in trade routesAtlantic commerce grew; Mediterranean declined relativelyEnglish, Dutch and French ports gained; Italian city-states lost influence

The Columbian Exchange

The term Columbian Exchange describes the two-way movement of organisms and ideas across the Atlantic. In one direction, from the Americas to Europe: maize, potatoes, tomatoes, sweet potatoes, cacao, tobacco and diseases of their own. In the other direction, from Europe to the Americas: wheat, horses, cattle, pigs, sheep, and — devastatingly — smallpox, measles and typhus. The diseases travelling west killed an estimated 50–90% of indigenous American populations within a century of contact. The crops travelling east would eventually transform European agriculture, but this impact was mostly felt after 1550.

Exam alert: economic vs. demographic impact: Examiners often ask about the impact on Europe specifically. Keep the Columbian Exchange focused on European effects: new foods arriving, tobacco trade, gold and silver inflation. The demographic catastrophe of indigenous peoples matters for global history but is a consequence for the Americas, not for European states — frame it accordingly in your essay.

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