Regions Explored During the Age of Exploration

The European voyages did not open empty seas. Each region they reached had its own long maritime history, its own trading systems, and its own political hierarchies. The Polynesians had colonized the habitable Pacific. The Malay thalassocracies controlled the South China Sea and the eastern Indian Ocean. The Swahili city-states ran the East African gold and ivory trade. The Ming court’s treasure fleets had reached the Swahili coast in the 1400s. The European voyages entered these systems as latecomers, and in some cases destroyed them. Any region-by-region account that omits the non-European prehistory is missing the actual story. What follows is a region-by-region account, with the indigenous and non-European maritime context restored.

The Atlantic Islands: The First European Colonies

The Canary Islands, the Azores, Madeira, and the Cape Verde Islands were the first overseas regions to come under sustained European control. The Canaries were known to the Romans and to medieval Arab and European geographers, but European conquest did not begin until 1402, and was not completed until 1496. The islands’ indigenous Guanche population was largely absorbed, killed, or sold into slavery in the 15th century. The Azores were reached by the Portuguese in the 1420s and 1430s, and the Cape Verde Islands from the 1460s. Madeira, colonized from the 1420s, was the site of the first large-scale sugar plantation worked by enslaved African labor — a labor model that would be exported to Brazil and the Caribbean.

The Atlantic islands were not, on the European side, places of high romance. They were the staging points of the deeper Atlantic voyages, the laboratories of European colonial rule, and the early economic engines of the sugar-and-slave system that would dominate the Atlantic economy for the next three centuries.

West and Central Africa: A Trading Coast, Not an Interior

The Portuguese, beginning in the 1410s and 1420s under the patronage of Prince Henry, gradually pushed south along the African coast. Gil Eanes rounded Cape Bojador in 1434. The Senegal River was reached in the 1440s. The Gulf of Guinea was explored in the 1470s. Diogo Cão reached the Congo River in 1482. Bartolomeu Dias rounded the Cape of Good Hope in 1488. The interior of sub-Saharan Africa, however, remained substantially unknown to Europeans until the 19th century, and the European presence on the African coast was limited to trading posts (feitorias) at Elmina, Luanda, Mozambique, Mombasa, and Sofala until the late-19th-century Scramble.

This matters because the standard textbook map of “explored Africa” obscures the difference between reaching the coast and knowing the interior. The Portuguese coastal trading posts of the 15th and 16th centuries were not the equivalent of the Spanish conquests in the Americas. They were dealing with sophisticated African states — the Kingdom of Kongo, the Swahili city-states, the Oyo and Benin kingdoms further west — that had their own commercial and political systems. The Portuguese feitorias were nodes in African trade networks, not European colonies in the American sense. The Trans-Atlantic Slave Trade Database (Eltis and Richardson, 2008) and the longer treatments in John Thornton’s Africa and Africans in the Making of the Atlantic World (1992) are the standard starting points for the African side of the story.

The Americas: A Demographic Catastrophe Hiding Behind a Cartographic Triumph

The European mapping of the Americas was the most impressive cartographic achievement of the era. By 1600, Europeans had charted the Atlantic coastlines of both American continents, found the Pacific coast by Balboa in 1513, mapped the Gulf of Mexico, the Caribbean, the Magellan Strait, and the major river systems. The cartographic triumph hid a demographic catastrophe. The indigenous population of the Western Hemisphere, estimated by Denevan (1976, revised 1992) at 60 to 100 million in 1492, had fallen to perhaps 5 to 10 million by 1600 in the worst-affected regions. The proximate cause was the Old World pathogens — smallpox first, then measles, influenza, and a long list of others — against which the indigenous populations had no acquired immunity.

The Caribbean was the first American region explored and the first to be depopulated. Hispaniola alone may have lost 90 percent of its indigenous population in the first generation after contact. Mexico fell to Cortés between 1519 and 1521, and the conquest was followed by a 1520 smallpox epidemic that killed the Aztec emperor Cuitláhuac and a large fraction of the central Mexican population (Cook 1998). The Andes fell to Pizarro between 1532 and 1533, again with smallpox as the decisive ally. By 1600, the political systems of the Aztec and Inca empires had been destroyed, and the demographic base of the Americas had been catastrophically reduced. The silver mines of Potosí (discovered 1545) and Zacatecas (discovered 1546) supplied the bulk of the 16th-century price revolution. The plantation economies of Brazil and the Caribbean would, by 1700, define the Atlantic economy more than the silver mines did.

The Indian Ocean: A Working System the Portuguese Entered

The standard “Age of Exploration” framing treats the Indian Ocean as a region the Portuguese discovered. They did not. When Vasco da Gama reached Calicut in May 1498, the Indian Ocean had been a busy, integrated trading system for at least a thousand years. Arab, Persian, Gujarati, and Chinese merchants ran the monsoon trade between East Africa, India, Southeast Asia, and China. The Swahili city-states, particularly Kilwa, Mombasa, and Malindi, controlled the East African gold and ivory trade. The Ming court’s treasure-fleets under Zheng He had reached the Swahili coast in the 1400s. The Portuguese were entering a working system, and they entered it as a naval power, not as a commercial one. The famous violence of da Gama’s second voyage (1502) was the introduction.

The consequences for the Indian Ocean system were uneven. The Portuguese Estado da Índia, headquartered at Goa after 1510, controlled the key chokepoints — Hormuz, Malacca, Goa, Cochin — for the rest of the 16th century, and the Portuguese crown drew a substantial share of the spice-trade profits. The Dutch displaced them in the East Indies in the 1620s–1640s, and the English displaced them in India in the 18th century. By 1700, the Portuguese Estado da Índia was a minor regional power. But the Indian Ocean trading system itself was not destroyed, and Asian merchants continued to dominate the regional trade well into the 18th century. K.N. Chaudhuri’s Trade and Civilisation in the Indian Ocean (1985) and Sanjay Subrahmanyam’s The Portuguese Empire in Asia, 1500–1700 (1993) are the standard starting points.

The Pacific: The Last Ocean Mapped

The Pacific was the last major ocean to be mapped by Europeans, and the Polynesian settlement of the habitable Pacific was, on the most careful archaeology, complete by about 1200 CE. The Polynesian wayfinding tradition, which used wave patterns, star paths, and bird flights to navigate thousands of kilometres without compass or chart, is one of the great maritime achievements of human history. Ben Finney’s Voyage of Rediscovery (1994) and the wider work of the Polynesian Voyaging Society are the accessible starting points; Thomas’s Voyaging in Wake of the Small Planets is the harder version.

Magellan’s crossing of the Pacific in 1520–1521 was the European breakthrough, though the death toll on the crossing — 98 days without seeing land, with crews reduced to eating leather and rat droppings — is one of the strongest arguments against treating European voyages as straightforward triumphs. The Spanish voyages of the 16th century (Saavedra, Villalobos, Legazpi) established the broad Pacific outline. Abel Tasman, working for the VOC, discovered Tasmania and New Zealand in 1642. James Cook’s three voyages between 1768 and 1779 mapped the Pacific in detail, claimed eastern Australia for Britain, and ended the era of the Polynesian Pacific as a self-contained system. Cook’s voyages are, depending on perspective, the end of the European exploration of the Pacific or the beginning of the European colonization of it.

The Polar Regions: A 400-Year Search

The search for a Northeast Passage along the Russian Arctic coast and a Northwest Passage along the Canadian Arctic coast was a recurring theme from the early 16th century. Hugh Willoughby and Richard Chancellor attempted the Northeast Passage in 1553–1554; Chancellor reached the White Sea and opened the English trade with Russia via the Muscovy Company, while Willoughby and his crew died on the Kola Peninsula. Martin Frobisher made three voyages to the Canadian Arctic in the 1570s in search of the Northwest Passage, and Henry Hudson explored Hudson Bay in 1610–1611. The Northeast Passage was finally navigated by Adolf Erik Nordenskiöld in 1878–1879. The Northwest Passage was completed by Roald Amundsen in 1903–1906. The four-century search is sometimes treated as a continuation of the European impulse to map the world; it is also a useful reminder of how much of the world’s geography remained unmapped long after the conventional end of the Age of Exploration.