[{"data":1,"prerenderedAt":1254},["ShallowReactive",2],{"layer:exploration:discover":3},{"layer":4,"contentHash":1235,"dependencyHashes":1236,"approval":1248,"releaseId":1253},{"schemaVersion":5,"conceptId":6,"locale":7,"depth":8,"revision":5,"title":9,"subtitle":10,"summary":11,"objectives":12,"estimatedMinutes":18,"plate":19,"blocks":43,"sourceIds":1230,"reviewStatus":1231,"authoring":1232},1,"exploration","en","discover","Why sail into an ocean nobody has mapped?","Reasons, routes and results, told from both ends of the voyage","Meet exploration honestly: what the word means and why 'discovery' misleads, six reasons people set out, the busy Indian Ocean world before European ships, how sailors found their way, four voyages worth knowing, and what followed - new foods, new maps, disease, slavery and empire.",[13,14,15,16,17],"Explain why historians prefer 'encounter' to 'discovery' when a ship reaches an inhabited place.","Name six reasons people set out, and tell a reason apart from a consequence.","Describe the Indian Ocean trading world before 1498 and how the monsoon set its timetable.","Say how a sailor found latitude from the Pole Star, and why longitude was much harder.","Give examples of both the gains and the harms that followed the voyages, and say who gained and who paid.",40,{"title":20,"rows":21},"Lesson plate",[22,25,28,31,34,37,40],{"label":23,"value":24},"Depth","Discover",{"label":26,"value":27},"Reading time","≈ 40 minutes",{"label":29,"value":30},"Prior knowledge","None needed",{"label":32,"value":33},"Chapters","10",{"label":35,"value":36},"Labs","Voyage map, reasons\u002Fconsequences, crops, gained\u002Fpaid",{"label":38,"value":39},"Hard parts","Chapter 7 covers disease and slavery plainly",{"label":41,"value":42},"Numbers","Ranges are given where historians disagree",[44,48,54,60,63,68,73,112,117,144,149,152,225,230,283,297,302,305,346,350,379,490,494,509,514,517,556,581,597,602,607,612,615,632,661,666,670,683,697,702,705,730,769,773,785,789,794,798,801,804,840,844,847,895,901,906,909,941,994,998,1003,1006,1034,1039,1043,1048,1053,1104,1108,1204,1219],{"id":45,"type":46,"markdown":47},"intro-question","prose","Look at a world map for a moment. Every coastline on it has a name, every island has a shape, and a phone in your pocket can tell you where you are to within a few metres.\n\nNow take all of that away.\n\nYou are standing on a beach five hundred years ago. You know your own coast well. You know the ports your family's boats visit. Beyond that, the sea just keeps going, and nobody you have ever met has come back from the far side of it.\n\n**Would you get in a boat?**\n\nMillions of people did. Not because they were braver than you, but because they wanted something: pepper, or a holy city, or land to farm, or an answer, or simply to get away. This topic is about what sent them out, and about everything that happened afterwards, to them and to the people they met.",{"id":49,"type":50,"variant":51,"title":52,"markdown":53},"how-to-read","callout","observation","How to read this lesson","Read the chapters in order the first time. When you meet a **prediction**, decide on your answer before you read on.\n\nSome of what follows is happy: new foods, new maps, new ideas. Some of it is not: people were taken from their homes, and diseases killed enormous numbers. Both parts are true, and you need both to understand what exploration actually did.",{"id":55,"type":56,"title":57,"eyebrow":58,"navLabel":59},"ch01","chapter","What 'exploration' means, and the problem with 'discovery'","Chapter 01","1 What the word means",{"id":61,"type":46,"markdown":62},"what-is-exploration","**Exploration** means travelling to find out what is there. It is one of the oldest things humans do. The first people to walk out of Africa were explorers. So were the sailors who found their way to the islands of the Pacific in outrigger canoes, thousands of years before Europe had ocean-going ships.\n\nSo when a history book says a place was **discovered** in a particular year, stop and ask one question:\n\n**Discovered by whom?**\n\nBecause almost every place a European ship reached between 1400 and 1800 already had people living in it. They had names for their own rivers and mountains. They had kings, farms, markets, songs and laws. What happened was not a discovery. It was a **meeting**, usually an unequal one.",{"id":64,"type":50,"variant":65,"title":66,"markdown":67},"def-explore","definition","Three words, kept straight","- **Explore** — to travel somewhere to find out what is there. Anyone can explore anywhere, including the street behind your house.\n- **Discover** — to find something nobody knew about. Fair for a new comet. Unfair for a country with two million people already living in it.\n- **Encounter** — a meeting between two groups who did not know each other. This is usually the honest word for what happened in 1492 and 1498.",{"id":69,"type":50,"variant":70,"title":71,"markdown":72},"mis-discovery","misconception","“Columbus discovered America”","When Columbus's ships reached a Caribbean island on 12 October 1492, people were standing on the beach watching them arrive. The Americas were already home to tens of millions of people: the Mexica, the Inka, the Maya, the Taino, the Haudenosaunee and hundreds of other nations.\n\nHistorians argue about exactly how many. Published estimates for the whole of the Americas in 1492 run from about **8 million** to over **112 million**, and most recent work lands somewhere near **50-60 million**. Nobody was counting at the time, so every figure is a reconstruction.\n\nWhat is certain is that the number was not zero. Columbus did not find an empty continent. He found somebody else's home.",{"id":74,"type":75,"caption":76,"columns":77,"rows":82},"table-already-there","table","Some of the places Europeans called “new”, and who was already living there",[78,79,80,81],"Place","Already home to","For how long","What they had built",[83,88,93,97,102,107],[84,85,86,87],"The Caribbean islands","Taino, Kalinago and other peoples","Over 1,000 years","Villages, chiefdoms, farms of cassava and maize, canoe trade between islands",[89,90,91,92],"Central Mexico","The Mexica (Aztecs) and many other nations","Thousands of years","Tenochtitlan, a city on a lake with causeways, canals and markets bigger than most in Europe",[94,95,91,96],"The Andes","The Inka and the peoples they ruled","Roads over 30,000 km long, suspension bridges, terraced farms, records kept on knotted cords called *quipu*",[98,99,100,101],"Southern Africa's coast","Khoikhoi herders, and Swahili trading cities further north","Very long","Stone-built ports such as Kilwa, trading with Arabia, India and China",[103,104,105,106],"The Malabar coast of India","Malayali kingdoms, with Arab, Jewish and Chinese merchant communities","Well over 1,500 years","Calicut, one of the busiest pepper ports on Earth, with its own harbour rules",[108,109,110,111],"Australia","Aboriginal peoples, hundreds of nations and languages","Over 50,000 years","The longest continuous cultures on Earth, with detailed knowledge of land, fire and water",{"id":113,"type":50,"variant":114,"title":115,"markdown":116},"aha-two-sides","aha","Every voyage has at least two stories","The ship's story is usually written down: a log, a letter home, a report to a king. The shore's story is usually not, or it is written much later, or it is remembered out loud and only written down by somebody else.\n\nThat does not make the shore's story less true. It makes it harder to find. Later in this topic you will look at how historians hunt for it.",{"id":118,"type":119,"itemId":120,"prompt":121,"check":122,"hints":138,"feedback":141},"p-discovery","practice","exploration.discover-whom","A textbook says: *“In 1498 Vasco da Gama discovered India.”* What is wrong with that sentence?",{"kind":123,"options":124,"correct":137},"choice",[125,128,131,134],{"id":126,"label":127},"a","The date is wrong; he arrived in 1497",{"id":129,"label":130},"b","India was already there, with millions of people, cities and trade routes. He found a sea route to it",{"id":132,"label":133},"c","It was not da Gama but Columbus",{"id":135,"label":136},"d","Nothing is wrong with it",[129],[139,140],"Ask: could anyone in Calicut in 1497 have told you where India was?","What exactly was new, and new to whom?",{"correct":142,"incorrect":143},"Exactly. What was new was a **sea route from Europe round Africa to India**, and it was new to Europeans. India was not new to Indians.","Look again at option b. India had cities, kingdoms and a thousand years of sea trade before 1498. The new thing was the route, and it was only new to one side.",{"id":145,"type":56,"title":146,"eyebrow":147,"navLabel":148},"ch02","Six reasons people set out","Chapter 02","2 Why they went",{"id":150,"type":46,"markdown":151},"reasons-intro","People did not sail into unknown water for one reason. They sailed for a tangle of reasons, and the reason a king wrote in a royal order was often not the reason the sailors climbed aboard.\n\nHere are the six that come up again and again. Most real voyages had three or four of them at once.",{"id":153,"type":154,"title":146,"prompt":155,"options":156},"explore-reasons","explorer","Pick a reason to see how it worked and who it moved.",[157,169,180,191,203,214],{"id":158,"label":159,"chain":160,"badge":165,"note":168},"curiosity","Curiosity",[161,162,163,164],"A question nobody can answer","Someone decides to go and look","They write down what they see","The map gets bigger",{"text":166,"tone":167},"Pure wanting to know","yes","Sometimes the honest answer is: they wanted to know. Ibn Battuta left Tangier at 21 for the pilgrimage to Mecca and simply kept going for about 29 years, across Africa, Arabia, India, the Maldives and China. Cook's first voyage was sent to watch Venus cross the Sun from Tahiti, a measurement that helped work out the Sun's distance. Curiosity rarely paid for a voyage alone; it usually travelled with money.",{"id":170,"label":171,"chain":172,"badge":177,"note":179},"trade","Trade and wealth",[173,174,175,176],"A good is cheap where it grows","It is dear far away","Move it and you get rich","Now control the route",{"text":178,"tone":167},"The commonest reason","Pepper grew on the Malabar coast and sold for many times more in Lisbon. Silk came from China, cotton cloth from Gujarat and Bengal, cloves and nutmeg from a handful of Indonesian islands, gold from west Africa. Whoever carried these goods made money; whoever *controlled the route* made far more, which is why trade so often turned into forts, fleets and wars.",{"id":181,"label":182,"chain":183,"badge":188,"note":190},"faith","Religion and pilgrimage",[184,185,186,187],"A holy place far away","People travel to it","Roads and ships appear to carry them","Ideas travel too",{"text":189,"tone":167},"Moved millions","The hajj to Mecca moved more people across long distances, year after year, than any voyage of exploration. Buddhist monks such as Xuanzang walked from China to India and back for texts. Faith also gave rulers an excuse: 'we are doing this for God' justified a great deal that had nothing to do with God.",{"id":192,"label":193,"chain":194,"badge":199,"note":202},"escape","Escape and migration",[195,196,197,198],"Home becomes hard","Famine, war, debt or persecution","People leave","A new place, by necessity",{"text":200,"tone":201},"Not an adventure","no","Plenty of travel was not adventure at all: leaving because staying was worse, from famine, war, taxes, debt or persecution. Whole communities moved this way. The very largest forced movement of all was not a choice at all: millions of Africans were captured and shipped across the Atlantic against their will. More in chapter seven.",{"id":204,"label":205,"chain":206,"badge":211,"note":213},"rivalry","Rivalry between rulers",[207,208,209,210],"Our rival gets rich","We must not fall behind","Fund a voyage","Claim it before they do",{"text":212,"tone":167},"A powerful engine","Portugal found the sea route to India, so Spain paid Columbus to look for a different one. Spain got rich in the Americas, so England, France and the Netherlands sent their own ships. Rulers funded voyages partly for the thing itself, mostly so that somebody else did not get there first.",{"id":215,"label":216,"chain":217,"badge":222,"note":224},"accident","Accident",[218,219,220,221],"A storm","Blown off course","Land nobody expected","A story to tell at home",{"text":223,"tone":167},"More common than you think","Cabral, sailing for India in 1500, swung so far west that he bumped into Brazil. Storms and broken rudders put ships on coasts nobody was aiming for, and are under-reported: if the ship never got home, nobody wrote it down. Much of what we call exploration is people getting lost and surviving.",{"id":226,"type":50,"variant":227,"title":228,"markdown":229},"ex-pepper-money","example","Why a sack of pepper was worth the risk","Suppose a sack of pepper costs **3 coins** in Calicut and sells for **60 coins** in Lisbon. That is **20 times** the price, for the same sack, because of where it ended up.\n\nFit out a ship with **200 sacks**: they cost 600 coins to buy and bring in 12,000 coins when sold.\n\nNow the catch. The voyage itself costs about **5,000 coins** in ships, food, wages and repairs, and takes the better part of two years. You still come out **6,400 coins** ahead, which is roughly **114%** more than everything you spent. But if half your ships sink, you clear only **400 coins**, and if all of them sink you are ruined.\n\n(These are round numbers chosen to show the shape of the thing, not real prices. The real ones varied wildly.)",{"id":231,"type":232,"component":233,"componentVersion":5,"config":234,"objective":281,"textAlternative":282},"lab-sort-reasons","interactive","sort-game",{"prompt":235,"bins":236,"items":243,"seconds":280},"Reason for setting out, or consequence of having gone? Sort each card.",[237,240],{"id":238,"label":239},"reason","A reason they went",{"id":241,"label":242},"consequence","A consequence of going",[244,248,252,256,260,264,268,272,276],{"id":245,"label":246,"bin":238,"why":247},"s1","Pepper sells for many times more in Europe than in Kerala","The price gap is what made the voyage worth attempting. It came first.",{"id":249,"label":250,"bin":238,"why":251},"s3","The king of Portugal wants what Spain is getting","Rivalry between rulers funded a great many voyages.",{"id":253,"label":254,"bin":241,"why":255},"s4","Smallpox spreads through the Americas","A terrible and unintended result. Nobody in 1492 understood how disease spread.",{"id":257,"label":258,"bin":238,"why":259},"s5","A pilgrim wants to reach Mecca","Faith moved more travellers, more often, than any other single reason.",{"id":261,"label":262,"bin":238,"why":263},"s7","A young man is curious about what is over the horizon","Curiosity is real, even though it rarely paid for a ship by itself.",{"id":265,"label":266,"bin":241,"why":267},"s8","The East India Company ends up collecting taxes in Bengal","A trading company turned into a government. No merchant in 1600 planned this.",{"id":269,"label":270,"bin":238,"why":271},"s9","A storm blows a ship far off its course","Accident put ships on coasts nobody was aiming for. It is a reason the voyage happened, not a result of it.",{"id":273,"label":274,"bin":241,"why":275},"s11","Millions of people are taken from Africa by force","The most terrible consequence of the Atlantic crossings, and one that then became a reason for further voyages.",{"id":277,"label":278,"bin":238,"why":279},"s12","Cloves grow on only a few small islands","Scarcity in one place plus demand in another is the classic reason a trade route exists.",0,"Tell the reasons people set out apart from the things that happened because they did.","Nine cards drop into two bins: **a reason they went** and **a consequence of going**.\n\nReasons come first and belong to the people setting out: the price of pepper in Lisbon, a king who does not want to be beaten by a rival, a pilgrim heading for Mecca, curiosity, a storm.\n\nConsequences come afterwards and often reach people who never boarded a ship: smallpox in the Americas, a trading company collecting taxes in Bengal, millions of Africans taken across the Atlantic by force.\n\nThe hardest cards are the ones that are both. Slavery began as a consequence of the Atlantic crossings and then became a *reason* for thousands more voyages. When a card feels like both, that is worth noticing, not a mistake.",{"id":284,"type":285,"prompt":286,"options":287,"explanation":296},"pred-why-west","prediction","Columbus sailed **west** from Spain in 1492 hoping to reach Asia and its spices. Why not just sail east like everyone else?",[288,290,292,294],{"id":126,"label":289},"Nobody had thought of sailing east",{"id":129,"label":291},"The eastern routes were long, taxed at every stage, and Portugal was already taking the African route",{"id":132,"label":293},"He knew the Americas were in the way",{"id":135,"label":295},"Westward winds made it easier to reach China","**b.** The overland and Red Sea routes to Asia were ancient and busy, but goods changed hands many times and each merchant and ruler took a cut. Meanwhile Portugal was working its way down the African coast towards its own sea route. Columbus's pitch to the Spanish crown was: *let me go the other way round and get there first.*\n\nHe was wrong about the size of the Earth, badly wrong. He thought Asia was perhaps 4,000 km west of the Canaries. It is more like 20,000 km, and two continents and the widest ocean on the planet are in between. If the Americas had not been there, he and his crews would have died of thirst long before reaching Asia.\n\nHe never accepted this. On all four of his voyages he kept insisting he had reached the edge of Asia.",{"id":298,"type":56,"title":299,"eyebrow":300,"navLabel":301},"ch03","The Indian Ocean was already a busy place","Chapter 03","3 A crowded ocean",{"id":303,"type":46,"markdown":304},"indian-ocean-intro","Here is the part most story books leave out.\n\nLong before a European ship rounded Africa, the Indian Ocean was one of the busiest trading regions on Earth. Ships ran between east Africa, Arabia, Gujarat, the Malabar coast, Sri Lanka, Bengal, Southeast Asia and China. Merchants from a dozen communities lived in each other's port cities. There were agreed ways of weighing goods, settling disputes and paying customs duties.\n\nWe are not guessing. A Greek-speaking merchant in Egypt wrote a practical handbook to this ocean, the **Periplus of the Erythraean Sea**, about **about 40-70 CE**. That is roughly **1,971 years ago**, about fourteen centuries before da Gama. It lists ports down the African coast and along India, what each one buys and sells, and which month to sail.\n\nSo when Vasco da Gama's three ships arrived at Calicut in 1498, they were not opening a sea. They were arriving, rather late, at a party that had been going for well over a thousand years.",{"id":306,"type":307,"title":308,"items":309},"timeline-indian-ocean","timeline","The Indian Ocean world, long before 1498",[310,314,318,322,326,330,334,338,342],{"time":311,"title":312,"text":313},"c. 2500 BCE","Indus and Mesopotamia","Seals, beads and weights from the Indus cities turn up in Mesopotamia. Sea and coastal trade between them is already running.",{"time":315,"title":316,"text":317},"c. 300 BCE","Ports on both coasts","Indian ports trade with Arabia and the Red Sea. Buddhist and Jain merchant networks stretch along the routes.",{"time":319,"title":320,"text":321},"1st cent. CE","The monsoon written down","Greek and Roman writers credit a sailor named **Hippalus** with explaining the open-sea monsoon crossing to Mediterranean merchants. Arab and Indian sailors had been using those winds long before.",{"time":323,"title":324,"text":325},"c. 40-70 CE","The Periplus","A merchant's handbook lists ports, goods and sailing months from Egypt to the Malabar coast. Roman gold coins are found in south India.",{"time":327,"title":328,"text":329},"c. 800-1200","Arab and Swahili networks","Dhows link Basra, Muscat, Gujarat, Malabar and the Swahili coast. Kilwa, Mombasa and Calicut grow rich.",{"time":331,"title":332,"text":333},"9th century","A wreck full of proof","A ship carrying about 60,000 Chinese ceramic pieces sinks off Indonesia. Found in 1998, it shows Arab-style ship-building carrying Chinese cargo, on an Indian Ocean route.",{"time":335,"title":336,"text":337},"1325-1354","Ibn Battuta","A Moroccan traveller crosses this world for about 29 years, serving as a judge in Delhi and an envoy to China, and finds Muslim merchant communities almost everywhere.",{"time":339,"title":340,"text":341},"1405-1433","Zheng He's fleets","Ming China sends seven enormous fleets west, reaching Calicut, Hormuz and the east African coast.",{"time":343,"title":344,"text":345},"1498","Da Gama arrives","Three Portuguese ships reach Calicut, guided across the Arabian Sea by a pilot hired at Malindi who already knew the way.",{"id":347,"type":50,"variant":51,"title":348,"markdown":349},"obs-monsoon","The wind has a timetable","The Indian Ocean has something the Atlantic does not: a wind that reverses twice a year.\n\n- The **south-west monsoon** blows roughly from **June to September**, pushing ships from Arabia and east Africa towards India.\n- The **north-east monsoon** blows roughly from **November to February**, pushing them back again.\n\nSo the ocean runs on a timetable. Miss your wind and you wait months. A merchant arriving in Calicut in August might sit in port until about December, roughly **108 days**, before the wind turned for home. Whole cities grew around that waiting: warehouses, lodging houses, moneylenders, interpreters.\n\nThis is why an Indian Ocean round trip took about **a year**, and why everyone's calendar, prices and festivals were tied to the wind.",{"id":351,"type":352,"title":353,"items":354},"steps-monsoon-year","steps","One year in the life of a pepper ship",[355,359,363,367,371,375],{"title":356,"tag":357,"text":358},"Load at Aden","April-May","Take on dates, horses, glassware and silver. Wait for the wind to swing.",{"title":360,"tag":361,"text":362},"Cross with the south-west monsoon","June-August","Run before a strong, wet wind straight across the Arabian Sea. Fast but rough: ships are lost every season.",{"title":364,"tag":365,"text":366},"Sell and buy in Calicut","August-November","Sell the cargo, buy pepper, ginger, cotton cloth and cinnamon. Live in the port for months. Learn some Malayalam.",{"title":368,"tag":369,"text":370},"Wait","September-November","The wind is wrong. Nothing to do but trade, repair, borrow money and wait. Port cities make a great deal of their income from this waiting.",{"title":372,"tag":373,"text":374},"Return with the north-east monsoon","December-February","The wind reverses and carries you home across the same sea.",{"title":376,"tag":377,"text":378},"Sell at home","March","Pepper reaches Aden, then Cairo, then Venice, gaining price at every stop.",{"id":380,"type":232,"component":381,"componentVersion":5,"config":382,"objective":488,"textAlternative":489},"lab-map-first","voyage-map",{"voyages":383,"showWinds":487},[384,405,435,460],{"id":385,"label":386,"year":387,"from":388,"to":389,"path":390,"why":403,"consequence":404},"monsoon-run","The monsoon run to Calicut","for centuries","Aden","Calicut",[391,394,397,400],[392,393],12.79,45.03,[395,396],12.5,54,[398,399],14,62,[401,402],11.25,75.78,"Pepper, cotton cloth, horses and dates. Arab, Gujarati and Malabari merchants ran this route long before any European ship arrived, timing it by the monsoon winds.","A trading world with its own money, laws, languages and pilots. When Europeans arrived they did not find an empty sea; they joined a crowded one, and later tried to control it.",{"id":406,"label":407,"year":339,"from":408,"to":409,"path":410,"why":433,"consequence":434},"zheng-he","Zheng He's treasure fleets","Nanjing","Malindi",[411,414,417,420,423,424,427,430],[412,413],32.06,118.8,[415,416],24.87,118.68,[418,419],2.19,102.25,[421,422],6.05,80.22,[401,402],[425,426],27.1,56.45,[428,429],2.04,45.34,[431,432],-3.22,40.12,"Ming China sent huge fleets to show its power, collect tribute, carry envoys and trade in silk, porcelain and spices. Zheng He commanded seven voyages.","Ports from Calicut to the east African coast were linked to China by treaty and trade. Then the Ming court stopped the voyages, and the fleets were never rebuilt.",{"id":436,"label":437,"year":438,"from":439,"to":389,"path":440,"why":458,"consequence":459},"da-gama","Vasco da Gama to Calicut","1497-1498","Lisbon",[441,444,447,450,453,456,457],[442,443],38.71,-9.14,[445,446],14.93,-23.51,[448,449],-20,-30,[451,452],-34.36,18.47,[454,455],-15.03,40.73,[431,432],[401,402],"Portugal wanted pepper and other spices without paying merchants along the overland route, and wanted to weaken its rivals. The king backed the voyage.","The first sea route from Europe to India. Within twelve years Portugal held Goa, and European companies began to compete, then fight, for control of Indian Ocean trade.",{"id":461,"label":462,"year":463,"from":464,"to":465,"path":466,"why":485,"consequence":486},"silk-roads","The Silk Roads","many centuries","Chang'an","Constantinople",[467,470,473,476,479,482],[468,469],34.27,108.95,[471,472],40.14,94.66,[474,475],39.47,75.99,[477,478],39.65,66.96,[480,481],33.31,44.36,[483,484],41.01,28.98,"Not one road but a web of overland routes. Merchants moved silk, paper, spices and glass in short hops, each one handing goods to the next.","Goods, coins, faiths, stories, technologies and diseases travelled together. Paper and the compass reached the west this way; so did plague.",true,"See that the Indian Ocean routes came first, and that the monsoon winds set their timetable.","A world map shows four routes, with monsoon winds drawn as arrows that flip between summer and winter directions.\n\n**The monsoon run** (used for centuries): Aden past Socotra straight across the Arabian Sea to Calicut. Flip the season and the arrows reverse.\n\n**Zheng He's treasure fleets** (1405-1433): Nanjing to Fujian, Malacca, Sri Lanka, Calicut, Hormuz and down the east African coast to Malindi, decades before any European ship arrived.\n\n**The Silk Roads**: an overland web from Chang'an through Dunhuang, Kashgar and Samarkand to Baghdad and Constantinople, moved in short hops.\n\n**Vasco da Gama** (1497-1498): Lisbon, Cape Verde, a huge swing into the empty south Atlantic, round the Cape of Good Hope, up to Malindi, then Calicut.\n\nNotice where da Gama's line joins the others: at Malindi, on a road everybody else had used for a thousand years.",{"id":491,"type":50,"variant":70,"title":492,"markdown":493},"mis-empty-sea","“Europeans opened the sea route to the East”","They opened *a* sea route, the long way round Africa from Europe. The eastern half of that journey, Malindi to Calicut, was an ordinary commercial crossing that Arab, Gujarati, Malabari and Swahili sailors made every year.\n\nDa Gama did not guess his way across the Arabian Sea. At Malindi he hired a **pilot** who knew the crossing, and reached Calicut in about **26 days**. What Portugal added was a connection between two systems, Europe's and the Indian Ocean's, that had not been directly joined by sea before, and then an armed effort to control it.",{"id":495,"type":119,"itemId":496,"prompt":497,"check":498,"hints":503,"feedback":506},"p-monsoon","exploration.discover-monsoon","A merchant reaches Calicut in **August**. The wind that will carry the ship home does not turn until about **December**. Roughly how many days must the ship wait in port?",{"kind":499,"answer":500,"tolerance":501,"unit":502},"number",108,20,"days",[504,505],"Count from mid-August to the start of December.","August has 31 days, September 30, October 31, November 30.",{"correct":507,"incorrect":508},"About **108 days**, roughly three and a half months. Anything from 90 to 130 is a sensible answer, since the wind does not turn on a fixed date.","Count the months from mid-August to 1 December: about half of August, then September, October and November. That is around 108 days.",{"id":510,"type":56,"title":511,"eyebrow":512,"navLabel":513},"ch04","Finding your way with no map and no satellite","Chapter 04","4 Finding the way",{"id":515,"type":46,"markdown":516},"nav-intro","Out of sight of land, in every direction, the sea looks exactly the same. So how did anyone know where they were?\n\nThey used four things, and they used them together, because each one on its own is not enough:\n\n1. **The sky.** The Sun by day, the Pole Star and other stars by night.\n2. **Instruments.** Simple tools for measuring how high a star is above the horizon.\n3. **The compass.** A magnetised needle that points roughly north even under thick cloud.\n4. **Memory and reckoning.** Knowing your speed, your heading and how long you have held it, and writing it all down hour by hour.\n\nNone of that told a sailor everything. It got them close, and close was usually enough to find a coast they recognised.",{"id":518,"type":75,"caption":519,"columns":520,"rows":525},"table-instruments","The toolkit of a long-distance sailor, and what each tool actually told you",[521,522,523,524],"Tool","Where it came from","What it measures","What it cannot do",[526,531,536,541,546,551],[527,528,529,530],"**Magnetic compass**","Invented in China; in use for navigation by the 11th century, spreading west through Arab and European sailors","Direction. The needle settles roughly north, cloud or no cloud","It does not tell you *where* you are, only which way you are pointing",[532,533,534,535],"**Kamal**","Arab and Indian Ocean sailors","How high the Pole Star is above the horizon, using a wooden card on a knotted cord held at arm's length","Useless south of the equator, where the Pole Star drops below the horizon",[537,538,539,540],"**Astrolabe and quadrant**","Greek idea, developed in the Islamic world, simplified for sea use","The height of the Sun or a star, in degrees, which gives your latitude","Very hard to read on a pitching deck; a few degrees of error is many kilometres",[542,543,544,545],"**Lead line**","Everywhere, very ancient","Depth of water, and with tallow on the end, what the seabed is made of","Only works near a coast; no use in deep ocean",[547,548,549,550],"**Log and sandglass**","Europe and elsewhere, late medieval","Speed, by timing a floating log paying out a knotted line. This is why ships' speed is still in *knots*","Errors add up hour after hour. Currents move the ship without the log noticing",[552,553,554,555],"**Charts and rutters**","Every sea-going culture kept some form of sailing directions","Coastlines, ports, hazards, and written notes such as *steer south-west for six days*","Only as good as the last person to sail that way, and often kept secret on purpose",{"id":557,"type":558,"tone":559,"items":560},"spec-nav-facts","spec","blue",[561,565,569,573,577],{"label":562,"big":563,"value":564},"Pole Star trick","altitude = latitude","The angle of the Pole Star above the horizon is (near enough) your latitude. At Kozhikode it sits about 11 degrees up; at Lisbon about 39.",{"label":566,"big":567,"value":568},"Lisbon to Kozhikode","27.4°","The difference in latitude, which is about **3,050 km** north to south.",{"label":570,"big":571,"value":572},"One degree of latitude","≈ 111.3 km","The Earth is about 40,000 km around, divided into 360 degrees. This is why small angle errors matter so much.",{"label":574,"big":575,"value":576},"The hard one","longitude","How far **east or west** you are. There is no star for it. Solving this took until the 1700s, and needed a clock.",{"label":578,"big":579,"value":580},"Compass, oldest use","11th century","Chinese texts describe using a magnetised needle to steer by, centuries before it appears in European records.",{"id":582,"type":583,"title":584,"problem":585,"steps":586,"help":592},"we-polaris","worked_example","Reading your latitude off the Pole Star","A ship's navigator in the Arabian Sea measures the Pole Star at **11 degrees** above the horizon. A second night, further north, it measures **23.6 degrees**.\n\nHow far north has the ship travelled, in kilometres?",[587,588,589,590,591],"The altitude of the Pole Star above the horizon is very nearly your **latitude**. So the ship has gone from about 11 degrees north to about 23.6 degrees north.","Change in latitude = 23.6 - 11 = **12.6 degrees**.","One degree of latitude is about **111.3 km** (the Earth is roughly 40,075 km around, and 40,075 ÷ 360 ≈ 111.3).","Distance north = 12.6 × 111.3 ≈ **1,402 km**.","Check it against real places: 11 degrees north is about Kozhikode, 23.6 degrees north is about Muscat. That is roughly the length of the Arabian Sea crossing, so the answer is the right size.",{"simplerExplanation":593,"hints":594},"The Pole Star climbs higher in the sky the further north you go, by one degree for every 111 km. So measure the angle, subtract, and multiply by 111.",[595,596],"Subtract the two angles first.","Then multiply by about 111 km per degree.",{"id":598,"type":50,"variant":599,"title":600,"markdown":601},"careful-sun","careful","Never look straight at the Sun","Old navigators measured the **Sun's** height at midday as well as the Pole Star's at night. Some of them went blind in one eye doing it.\n\nIf you try any angle-measuring outdoors, measure the Pole Star, the Moon or a distant building, never the Sun. Looking at the Sun, even for a moment, even through sunglasses or a phone camera, can damage your eyes permanently. There is no safe way to do it without proper solar filters.",{"id":603,"type":50,"variant":604,"title":605,"markdown":606},"tryit-kamal","try_it","Make a kamal in five minutes","Indian Ocean navigators used a **kamal**: a small rectangle of wood on a knotted string. You hold the string in your teeth, pull it taut, and slide the card until its bottom edge sits on the horizon and its top edge touches the Pole Star. The knot at your teeth tells you the angle.\n\nTo make one:\n\n1. Cut a card about **5 cm** tall. Punch a hole in the middle and thread a string through it.\n2. Tie a knot at **30 cm** from the card. Hold that knot in your teeth, string taut.\n3. The card now covers an angle of about **9.5 degrees**.\n4. Tie another knot at **60 cm**: now the card covers about **4.8 degrees**. Further away looks smaller.\n5. And a knot at **15 cm** gives about **18.9 degrees**.\n\nGo out on a clear night, find the Pole Star (in India it sits low in the north), and find which knot fits. You have just measured your latitude the way a sailor did a thousand years ago.",{"id":608,"type":56,"title":609,"eyebrow":610,"navLabel":611},"ch05","Four voyages worth knowing","Chapter 05","5 Four voyages",{"id":613,"type":46,"markdown":614},"voyages-intro","Thousands of voyages matter. These four are worth knowing first, because between them they show the whole range: a fleet that went to show off and then stopped; a voyage that connected two trading worlds; a voyage that went the wrong way and changed two continents; and a voyage that proved the oceans join up.\n\nNotice as you read: none of these was a lone hero. Every one depended on local pilots, borrowed charts, older knowledge and a great many people whose names nobody wrote down.",{"id":616,"type":307,"title":617,"items":618},"timeline-voyages","Four voyages, in order",[619,621,625,628],{"time":339,"title":407,"text":620},"Ming China sends **7 fleets** west over **28 years**. Ming records give the first voyage **317 ships** and about **27,800 men**. Then the court stops them.",{"time":622,"title":623,"text":624},"1492","Columbus crosses the Atlantic","Three ships leave Palos on 3 August and sight land on 12 October: **70 days**, of which **36** were the open-ocean run from the Canaries.",{"time":438,"title":626,"text":627},"Da Gama reaches Calicut","Lisbon to Calicut in **316 days**, including **93 days** out of sight of land in the south Atlantic and a **26-day** crossing from Malindi with a local pilot.",{"time":629,"title":630,"text":631},"1519-1522","Round the world","Five ships and about **270 men** leave Spain. **1,082 days** later one ship and **18 men** come home. Magellan is killed on the way; Elcano finishes the voyage.",{"id":633,"type":75,"caption":634,"columns":635,"rows":640},"table-four-voyages","The same four voyages, side by side",[636,637,638,639],"Voyage","Stated reason","What actually happened","Who helped, and is usually left out",[641,646,651,656],[642,643,644,645],"**Zheng He**, 1405-1433","Show the power of the Ming emperor, collect tribute, carry envoys, trade","Seven vast fleets reached India, Arabia and east Africa. Then the court decided the cost was not worth it and the voyages stopped. Later records were lost or destroyed.","Tens of thousands of sailors, shipwrights and interpreters, and the Indian Ocean pilots who guided the fleets into unfamiliar ports",[647,648,649,650],"**Columbus**, 1492","Reach Asia by sailing west; find spices, gold and converts","Reached Caribbean islands. Believed to his death that they were near Asia. His voyages began Spanish settlement, and with it conquest, forced labour and epidemic disease.","Taino people who fed and guided the crews, and the Andalusian sailors who did the actual sailing",[652,653,654,655],"**Da Gama**, 1497-1498","Find the sea route to the pepper of India, and weaken Muslim and Venetian control of the trade","Reached Calicut. The gifts he brought were so cheap that the Zamorin's court was unimpressed. He went home with a small cargo and enormous news.","The pilot hired at Malindi, who knew the Arabian Sea crossing; and every earlier Portuguese captain who had mapped a bit more of Africa",[657,658,659,660],"**Magellan and Elcano**, 1519-1522","Reach the Spice Islands by sailing west, without using Portuguese routes","Proved the world can be sailed round. Cost: about 270 men set out and 18 came home on one ship, roughly **6.7%**. Magellan was killed in the Philippines.","Enrique, an enslaved man from Southeast Asia who served as Magellan's interpreter, and the Pacific islanders who gave the starving crews food",{"id":662,"type":50,"variant":663,"title":664,"markdown":665},"nuance-pilot","nuance","The most important person on da Gama's ship","At Malindi, on the east African coast, da Gama took on a **pilot**: a navigator who already knew the crossing to India. With his help the fleet covered the Arabian Sea in about **26 days** and arrived at Calicut on **20 May 1498**.\n\nWe are not sure of his name. Portuguese accounts call him a Gujarati or a Moor; a later tradition names him Ibn Majid, a famous Arab navigator, but most historians now doubt that. So the man who made the most famous voyage in Portuguese history possible is, in the record, almost anonymous.\n\nThat pattern repeats everywhere in this topic. **The people who knew the way are usually the ones we know least about.**",{"id":667,"type":50,"variant":227,"title":668,"markdown":669},"ex-zheng-he","The fleets that stopped","Between 1405 and 1433, Ming China sent **7** fleets west under an admiral named Zheng He. Ming records give the first voyage **317 ships** and about **27,800 men**, which would make it larger than any European fleet for centuries afterwards.\n\nHow big were the biggest ships? Honestly, we are not sure. The traditional Ming figure works out at roughly **120-140 metres** long, and many naval historians think that is too big for a wooden hull and prefer **55-70 metres**. Either way, they were enormous.\n\nThen, after 1433, China stopped. The court decided the voyages cost more than they were worth, and turned its attention to its northern land borders instead. The ships rotted; some records were lost.\n\nIt is a useful thing to hold on to: **exploring is a choice, and choosing to stop is also a choice.** China had the ships, the maps and the skill to reach Europe by sea. It simply decided not to.",{"id":671,"type":285,"prompt":672,"options":673,"explanation":682},"pred-gifts","Da Gama arrived at Calicut with his best gifts for the Zamorin, the ruler: striped cloth, hats, coral, sugar, oil and honey. How did the court react?",[674,676,678,680],{"id":126,"label":675},"They were delighted and gave him a trading treaty at once",{"id":129,"label":677},"They were unimpressed: Calicut was a rich port used to gold, silver and fine goods",{"id":132,"label":679},"They had never seen cloth before",{"id":135,"label":681},"They refused to meet him at all","**b.** The Zamorin's officials looked at the gifts and told the Portuguese that the poorest merchant from Mecca brought better. Calicut traded in gold, silver, fine silk and the best cotton in the world. A few hats and some honey were slightly embarrassing.\n\nThis is the honest measure of where power sat in 1498. Portugal was the poorer partner arriving at a rich market, and it knew it. When it could not compete on goods, it came back with cannon instead: da Gama's second voyage in 1502 was an armed one.\n\nThat shift, from *we would like to trade* to *you will trade on our terms*, is the hinge this whole topic turns on.",{"id":684,"type":119,"itemId":685,"prompt":686,"check":687,"hints":691,"feedback":694},"p-magellan","exploration.discover-magellan-fraction","About **270** men left Spain with Magellan in 1519. **18** came home on the Victoria in 1522. What percentage came home? Round to one decimal place.",{"kind":499,"answer":688,"tolerance":689,"unit":690},6.7,0.3,"%",[692,693],"Percentage = part ÷ whole × 100.","18 ÷ 270 = 0.0666...",{"correct":695,"incorrect":696},"**6.7%**. Eighteen out of about 270 is roughly one man in fifteen. The first voyage round the world was also one of the deadliest.","Divide 18 by 270, then multiply by 100. 18 ÷ 270 = 0.0667, so about 6.7%.",{"id":698,"type":56,"title":699,"eyebrow":700,"navLabel":701},"ch06","What came back: the food on your plate","Chapter 06","6 Food moved",{"id":703,"type":46,"markdown":704},"food-intro","Here is a thing worth sitting with for a moment.\n\n**There were no chillies in India before about 1500.** No tomatoes. No potatoes. No cashew trees, no groundnuts, no papaya, no guava, no maize.\n\nEvery one of those plants is American. They grew in Mexico, Peru, Brazil and the Caribbean, and they reached India, Africa, China and Europe on ships, in the decades after 1492. Historians call this two-way movement of plants, animals and diseases the **Columbian exchange**.\n\nIt cuts both ways. Wheat, rice, sugarcane, bananas, coffee, oranges, horses, cattle, pigs and chickens went the other way, from Europe, Africa and Asia into the Americas, where none of them had existed either.\n\nAlmost nobody set out to make this happen. It is the largest accidental consequence in the whole story.",{"id":706,"type":75,"caption":707,"columns":708,"rows":711},"table-crops","Plants and animals that crossed, and roughly when",[709,710],"Out of the Americas","Into the Americas",[712,715,718,721,724,727],[713,714],"**Potato** - from the Andes. Slow to catch on in Europe, then it fed millions. India now grows about **56 million tonnes** a year, second only to China.","**Wheat** - from West Asia. Became the bread grain of the Americas.",[716,717],"**Chilli** - from Mexico and Central America. Reached India with Portuguese ships in the **early 1500s**. India is now the world's largest producer of dried chillies.","**Sugarcane** - from Asia via the Mediterranean. Planted on Caribbean and Brazilian plantations, and the demand for that sugar drove the Atlantic slave trade.",[719,720],"**Tomato** - from the Andes and Mexico. Italy, Spain and India all cook with it now as though it had always been there.","**Rice** - from Asia and Africa. Grown in the Carolinas and Brazil, largely using the skills of enslaved west African farmers.",[722,723],"**Maize** - from Mexico. Now a staple across Africa and a major crop in India.","**Coffee** - from Ethiopia via Arabia. Brazil is now the world's largest producer.",[725,726],"**Groundnut, cashew, pineapple, papaya, guava** - all American, all now grown across India.","**Horses, cattle, pigs, chickens, sheep** - none existed in the Americas. Horses changed life on the Great Plains within a few generations.",[728,729],"**Cocoa, vanilla, rubber, tobacco** - all American. Chocolate, car tyres and a great deal of later harm all start here.","**Bananas, citrus, onions, garlic, wheat-based bread** - ordinary foods in the Americas today, all arrivals.",{"id":731,"type":232,"component":732,"componentVersion":5,"config":733,"objective":767,"textAlternative":768},"lab-crops","match-pairs",{"prompt":734,"mode":735,"pairs":736},"Match each crop to where it originally grew.","connect",[737,740,743,746,749,752,755,758,761,764],{"a":738,"b":739},"Chilli","Mexico and Central America",{"a":741,"b":742},"Potato","The Andes, South America",{"a":744,"b":745},"Tomato","The Andes and Mexico",{"a":747,"b":748},"Maize","Mexico",{"a":750,"b":751},"Cashew","Brazil",{"a":753,"b":754},"Black pepper","The Malabar coast, India",{"a":756,"b":757},"Cinnamon","Sri Lanka",{"a":759,"b":760},"Cloves and nutmeg","The Maluku islands, Indonesia",{"a":762,"b":763},"Coffee","Ethiopia",{"a":765,"b":766},"Sugarcane","New Guinea and South Asia","Learn which everyday crops are native to the Americas and which are native to Asia and Africa.","Ten crops must be connected to their homelands.\n\n**From the Americas:** chilli (Mexico and Central America), potato (the Andes), tomato (the Andes and Mexico), maize (Mexico), cashew (Brazil).\n\n**From Asia and Africa:** black pepper (the Malabar coast of India), cinnamon (Sri Lanka), cloves and nutmeg (the Maluku islands of Indonesia), coffee (Ethiopia), sugarcane (New Guinea and South Asia).\n\nThe surprise for most Indian learners is the first group. Chilli, potato, tomato and cashew all feel completely Indian, and all four arrived after 1500. The surprise going the other way is that cloves and nutmeg grew, for most of history, on a handful of small islands and nowhere else on Earth, which is exactly why fleets sailed halfway round the world for them.",{"id":770,"type":50,"variant":114,"title":771,"markdown":772},"aha-chilli","The chilli is a newcomer, and it took over","Before chillies arrived, Indian cooking got its heat mainly from **black pepper** and **long pepper**. Pepper was expensive, and it grew in only some parts of the country.\n\nChillies came off Portuguese ships on the west coast in the **early 1500s**, roughly **526 years ago**. They turned out to grow almost anywhere in India, to dry and store easily, and to be far cheaper than pepper. Within a couple of centuries they were everywhere.\n\nToday India grows about **2 million tonnes** of dried chilli a year and is the world's largest producer and exporter. Guntur in Andhra Pradesh is one of the biggest chilli markets on the planet.\n\nSo the most Indian-tasting thing in the kitchen is a five-hundred-year-old immigrant. Food is like that almost everywhere.",{"id":774,"type":583,"title":775,"problem":776,"steps":777,"help":783},"we-potato-share","How much of the world's potatoes does India grow?","India grows about **56 million tonnes** of potatoes a year. World production is about **375 million tonnes**.\n\nWhat share of the world's potatoes is that? And what does the answer tell you about the Columbian exchange?",[778,779,780,781,782],"Share = India's amount ÷ world amount = 56 ÷ 375.","56 ÷ 375 = 0.149…","As a percentage: 0.149 × 100 ≈ **14.9%**, close to one seventh of all the potatoes grown on Earth.","Now the point. The potato is an Andean plant. Nobody in India had seen one before Portuguese and later Dutch ships brought it, some time in the 1500s or 1600s.","So roughly one in every seven potatoes in the world is grown in a country that had no potatoes at all six hundred years ago. That is the scale of the exchange.",{"anotherExample":784},"Do the same sum for chillies: India grows about 2 million tonnes of dried chilli, more than any other country, from a plant that was unknown here in 1490.",{"id":786,"type":50,"variant":51,"title":787,"markdown":788},"obs-not-all-good","New crops are not automatically good news","It is tempting to file the Columbian exchange under *happy accidents*. Be careful.\n\n- More food can mean more people can be fed, which is good. It can also mean landowners grow a cash crop for export instead of food for the people nearby.\n- **Sugarcane** in the Caribbean and Brazil was planted on an enormous scale, and the work was done by enslaved people. The sweetness in European tea was paid for in other people's lives.\n- Depending on one new crop is dangerous. When potato blight destroyed Ireland's crop in the 1840s, about a million people died and a million more emigrated.\n\nCrops move. What happens next depends on who owns the land and who takes the profit.",{"id":790,"type":56,"title":791,"eyebrow":792,"navLabel":793},"ch07","What else travelled: the hard part","Chapter 07","7 The hard part",{"id":795,"type":50,"variant":599,"title":796,"markdown":797},"careful-hard-part","This chapter is hard, and it is meant to be","What follows is the part of this history that hurts. Millions of people died of disease. Millions more were taken from their homes by force. Countries lost the right to govern themselves.\n\nIt is written here plainly, without horror-story detail, because you cannot understand exploration without it, and because the people it happened to deserve to be counted rather than skipped. If you need to stop and come back, that is fine.",{"id":799,"type":46,"markdown":800},"hard-disease","**Disease.** This is the largest single consequence of 1492, and the one nobody intended.\n\nPeople in Europe, Africa and Asia had been sharing diseases for thousands of years, along the trade routes you met in chapter three. Smallpox, measles, influenza and typhus were terrible there, but many survivors had some immunity, and populations had adjusted over centuries.\n\nThe peoples of the Americas had been separated from all of that for many thousands of years. When these diseases arrived on ships, they met populations with **no previous exposure at all**. Epidemics ran ahead of the ships, sometimes reaching villages years before any European did.\n\nHow many died? Nobody counted, so every number is a reconstruction from later records, archaeology and modelling, and historians genuinely disagree. Most estimates say the population of the Americas fell by somewhere around **about 85-95% on most estimates** over the century after 1492. A widely cited recent study puts it at roughly **60 million** people in 1492 falling to about **6 million** by 1600.\n\nWhichever estimate you take, it is one of the largest losses of human life in recorded history, and most of it was caused by germs rather than weapons. War, forced labour and the destruction of farming made it far worse: sick people cannot plant, and hungry people die of illnesses they might otherwise survive.",{"id":802,"type":46,"markdown":803},"hard-slavery","**Slavery.** The second consequence was deliberate.\n\nThe plantations that Europeans set up in the Caribbean, Brazil and North America grew sugar, tobacco and cotton, and they needed enormous amounts of labour. With local populations collapsing, European traders turned to Africa.\n\nBetween **1501 and 1866**, that is **365 years**, an estimated **12.5 million** African people were put onto ships bound for the Americas. About **10.7 million** arrived. The difference, roughly **1.8 million** people, or about **14.4%**, died during the crossing.\n\nThese are not guesses from thin air. Historians have gathered the records of more than 36,000 individual slaving voyages: ships' papers, port registers, insurance documents, sale records. The estimates come from counting.\n\nBehind every number is a person with a name, a family and a home they never saw again. Enslaved people resisted constantly: they ran, they rebelled, they kept languages, music, food and faith alive. The revolution in Haiti, begun in 1791, was led by enslaved people and ended with an independent country.\n\nAbolition, when it came, came slowly and was fought for hard, by formerly enslaved people, by campaigners, and through rebellion.",{"id":805,"type":75,"caption":806,"columns":807,"rows":811},"table-consequences","What the voyages set in motion (ranges where the figures are genuinely disputed)",[808,809,810],"Consequence","Roughly how big","How sure are we?",[812,816,820,824,828,832,836],[813,814,815],"New crops move both ways","About 12 major crops out of the Americas, about 11 plants and animals in","Very sure. We can date arrivals from records, paintings, recipes and plant genetics",[817,818,819],"Better maps and new science","Within about 250 years the world's coastlines were charted to within a few kilometres","Very sure. The maps survive and you can compare them",[821,822,823],"Population loss in the Americas","A fall of about about 85-95% on most estimates in the century after 1492","The *direction* is certain; the *size* is disputed. Estimates of the 1492 population run from 8 million to over 100 million",[825,826,827],"Transatlantic slave trade","About 12.5 million people embarked, about 10.7 million landed, 1501-1866","Well founded. Built from the records of over 36,000 voyages, though some voyages left no paper",[829,830,831],"Trading companies become rulers in India","From a first English charter in 1600 to Company rule over much of India by the 1800s","Very sure. Charters, treaties, battle records and revenue accounts all survive",[833,834,835],"Indian textiles pushed out of world markets","India's share of world manufacturing estimated to fall from about 25% in 1750 to about 2% by 1900","Disputed. These are reconstructions by economic historians and different scholars give different figures",[837,838,839],"Famines under colonial rule","The Bengal famine of 1770: estimates run from about 1 million to about 10 million. The Bengal famine of 1943: about 2-3 million","Deaths are estimates; the causes, including policy decisions, are still argued over",{"id":841,"type":50,"variant":663,"title":842,"markdown":843},"nuance-numbers","Why the numbers come with ranges","You will have noticed that some figures in this topic are exact (*20 May 1498*) and some are ranges (*about 85-95%*).\n\nThat is not vagueness. It is honesty.\n\n- **Dates in ships' logs** were written down at the time by someone who was there. We can check them against other logs. So we state them exactly.\n- **Populations before 1492** were never counted. Historians reconstruct them from archaeological sites, later tax records, farmland area and disease models. Different methods give different answers, and the answers differ by a factor of ten.\n\nA history book that gives you one confident number for the 1492 population of the Americas is hiding an argument. A good one gives you the range and tells you why it is wide.",{"id":845,"type":46,"markdown":846},"hard-india","**India.** The pattern here is different, and it takes about two hundred and fifty years to unfold.\n\nIt starts with trade. The Portuguese took Goa in **1510**. The English East India Company got its charter in **1600**, the Dutch VOC in **1602**, the French company in **1664**. All of them came to buy: pepper, cotton cloth, silk, indigo, saltpetre. Indian cotton textiles were the finest in the world, and Europe could not make anything like them.\n\nThen it changes. The companies built fortified warehouses, then hired soldiers to guard them, then used those soldiers in India's own political quarrels. After the battle of **Plassey in 1757** and **Buxar in 1764**, the East India Company was granted the **diwani** of Bengal in **1765**: the right to collect the land revenue of one of the richest regions on Earth.\n\nAt that point a trading company had become a government, with an army, taxes and courts, and no one in Britain or Bengal had exactly decided that it should.\n\nFrom **259 years** after da Gama's arrival to independence in **1947** is a long story of that power growing. British rule replaced Company rule in **1858**. Indian handloom weavers lost their markets as machine-made British cloth, protected by tariffs, took over. Famines killed millions. And out of all of it grew the movement that took the country's government back.",{"id":848,"type":307,"title":849,"items":850},"timeline-india","From trading post to independence",[851,855,859,863,867,871,875,879,883,887,891],{"time":852,"title":853,"text":854},"1510","Portugal takes Goa","An armed European base on the Indian coast, and control of some Indian Ocean shipping through licences and force.",{"time":856,"title":857,"text":858},"1600","English East India Company","Chartered on 31 December 1600 to trade with the East. It is a company of merchants, not a government.",{"time":860,"title":861,"text":862},"1602","Dutch VOC founded","The Dutch company is even bigger, and drives the Portuguese out of much of the spice trade.",{"time":864,"title":865,"text":866},"1664","French company founded","Pondicherry and other bases. Anglo-French rivalry in Europe is fought out in India too.",{"time":868,"title":869,"text":870},"1757","Plassey","The Company wins control of Bengal's politics, as much by alliances and bribery as by fighting.",{"time":872,"title":873,"text":874},"1765","The diwani of Bengal","The Company gains the right to collect Bengal's land revenue. A trading company now governs and taxes millions of people.",{"time":876,"title":877,"text":878},"1770","Bengal famine","A catastrophic famine in Bengal. Death estimates range from 1 million to 10 million; revenue demands were not reduced.",{"time":880,"title":881,"text":882},"1858","Crown rule","After the rebellion of 1857, the British government takes over from the Company directly.",{"time":884,"title":885,"text":886},"1885","Indian National Congress","A national political organisation forms. The demand for a say in government becomes organised and public.",{"time":888,"title":889,"text":890},"1930","The Salt March","A 385 km walk over 25 days to make salt from the sea, breaking a law that made it illegal. Mass civil disobedience follows.",{"time":892,"title":893,"text":894},"1947","Independence","182 years after the diwani, India governs itself again, and writes its own constitution.",{"id":896,"type":897,"conceptId":898,"relation":899,"explanation":900},"conn-government","connection","government-india","helps_understand","The Republic India built after 1947, its constitution, elections and rights, is in large part an answer to the two centuries of rule that began with trading ships.",{"id":902,"type":56,"title":903,"eyebrow":904,"navLabel":905},"ch08","Who gained and who paid","Chapter 08","8 Gained and paid",{"id":907,"type":46,"markdown":908},"who-intro","Here is the question that makes this topic worth studying, and the one that heroic storybooks skip:\n\n**Exploration was good for whom?**\n\nNot *was it good or bad*, which has no useful answer, but *good for whom, bad for whom, and how do we know*. Ask it of every voyage and the fog clears fast.",{"id":910,"type":75,"caption":911,"columns":912,"rows":916},"table-gained-paid","The same events, from both ends",[913,914,915],"Event","Who gained","Who paid",[917,921,925,929,933,937],[918,919,920],"Pepper reaches Europe by sea, 1498 onwards","Portuguese merchants and crown; later Dutch and English companies; European cooks, as prices fell","Arab, Gujarati and Venetian merchants cut out of the route; Malabar ports forced to sell on Portuguese terms, under threat of cannon",[922,923,924],"Sugar plantations in the Caribbean and Brazil","Planters, shipowners, European consumers, port cities such as Bristol and Nantes","Millions of enslaved African people; Caribbean peoples whose islands were taken",[926,927,928],"Silver mines at Potosi and elsewhere","The Spanish crown; European and Asian trade, which ran on that silver for centuries","Andean communities under forced labour drafts; whole valleys emptied of workers",[930,931,932],"Cotton cloth from Bengal and Gujarat, 1600s","Indian weavers and merchants at first; European companies; Europeans who finally had washable cloth","Later, the same weavers, when British machine cloth was protected by tariffs and Indian cloth was not",[934,935,936],"Cook's charts of the Pacific","Sailors everywhere: accurate charts save lives. Science gained real measurements","Aboriginal Australian and Maori peoples, whose land was claimed on the strength of those charts",[938,939,940],"Antarctic and space exploration today","Everyone, in principle: climate records, weather satellites, communications","Mostly nobody, so far, and that is not an accident. It is because treaties were written first",{"id":942,"type":232,"component":233,"componentVersion":5,"config":943,"objective":992,"textAlternative":993},"lab-sort-gained",{"prompt":944,"bins":945,"items":955,"seconds":280},"Who gained, and who paid? Sort each card into the right bin.",[946,949,952],{"id":947,"label":948},"gained","Mostly gained",{"id":950,"label":951},"paid","Mostly paid",{"id":953,"label":954},"both","Both, at different times",[956,960,964,968,972,976,980,984,988],{"id":957,"label":958,"bin":947,"why":959},"g1","Portuguese crown after 1500","Control of a pepper route and the customs revenue that came with it.",{"id":961,"label":962,"bin":950,"why":963},"g2","Enslaved Africans taken across the Atlantic","About 12.5 million people embarked between 1501 and 1866, against their will.",{"id":965,"label":966,"bin":950,"why":967},"g3","Caribbean peoples after 1492","Epidemic disease, forced labour and loss of land within a generation.",{"id":969,"label":970,"bin":953,"why":971},"g5","Bengal weavers, 1600s then 1800s","In the 1600s their cloth was the most wanted in the world. By the 1800s protected British machine cloth had taken their markets.",{"id":973,"label":974,"bin":950,"why":975},"g6","Venetian spice merchants","The sea route round Africa went around them. Their share of the trade shrank.",{"id":977,"label":978,"bin":947,"why":979},"g7","Indian farmers who grew chillies and potatoes","Two hardy, high-yielding new crops that suited Indian soils and Indian cooking.",{"id":981,"label":982,"bin":950,"why":983},"g8","Andean mine workers under forced labour","Silver enriched Spain and oiled world trade. The labour drafts fell on Andean communities.",{"id":985,"label":986,"bin":953,"why":987},"g9","Ships' crews on long voyages","Wages and a share of cargo for survivors; on Magellan's expedition about 93 in every 100 did not come home.",{"id":989,"label":990,"bin":953,"why":991},"g11","Malabar rulers such as the Zamorin","Rich from the pepper trade before 1498; then forced to deal with armed European fleets demanding exclusive terms.","Judge, for several different groups, whether the voyages mostly helped them, mostly cost them, or did both.","Nine groups of people are sorted into **mostly gained**, **mostly paid** and **both, at different times**.\n\nClear gains: the Portuguese crown and Indian farmers who got chillies and potatoes, two hardy new crops.\n\nClear costs: enslaved Africans, Caribbean peoples after 1492, Andean mine workers under forced labour drafts, and Venetian merchants cut out of the spice route.\n\nThe most interesting bin is **both**. Bengal weavers were the best-paid textile workers in the world in the 1600s and had lost their markets by the 1800s. The Zamorin of Calicut was rich from the pepper trade, then faced armed fleets demanding exclusive terms. Ordinary sailors got wages and a share of the cargo, if they survived, and on Magellan's expedition about 93 in every 100 did not.\n\nThe point of the game: the same event can be a gain and a loss at once, and can flip from one to the other over time.",{"id":995,"type":996,"prompt":997},"reflect-fair","reflection","Pick one voyage from this lesson. Write two short paragraphs about it: one from the deck of the ship, and one from the shore, watching it arrive. Use only things you can actually support from the lesson. Then write one sentence about which of the two you found harder to write, and why.",{"id":999,"type":56,"title":1000,"eyebrow":1001,"navLabel":1002},"ch09","How we know any of this","Chapter 09","9 How we know",{"id":1004,"type":46,"markdown":1005},"evidence-intro","You have just read a lot of confident sentences about things that happened five hundred years ago. Where does any of it come from?\n\nHistorians of exploration work from six main kinds of evidence, and each kind is good at some things and useless at others.",{"id":1007,"type":352,"title":1008,"items":1009},"steps-evidence","Six kinds of evidence, and what each one is good for",[1010,1014,1018,1022,1026,1030],{"title":1011,"tag":1012,"text":1013},"Ships' logs and journals","Written on board","Daily records of course, weather and distance. Excellent for dates and routes. Written by one side, usually for a boss, so the shore appears only through the writer's eyes.",{"title":1015,"tag":1016,"text":1017},"Port and customs records","Written by officials","Who paid duty on what, and when. Boring, and therefore honest: nobody writes a heroic customs ledger. Very good for what was actually traded.",{"title":1019,"tag":1020,"text":1021},"Letters, charters and treaties","Governments and companies","What people were *told* to do, and what they agreed. Shows intention, which is often different from what happened.",{"title":1023,"tag":1024,"text":1025},"Archaeology and shipwrecks","Dug up or dived on","Physical objects that cannot lie about what they are. The Belitung wreck, found in 1998, held about 60,000 Chinese ceramics in an Arab-built ship.",{"title":1027,"tag":1028,"text":1029},"Oral histories and traditions","Remembered and passed on","Often the only surviving account from the shore's side. Sometimes written down centuries later, which affects the detail but not necessarily the substance.",{"title":1031,"tag":1032,"text":1033},"Science on old material","Measured in a lab","Tree rings, ice cores, pollen, DNA of crops, isotopes in bones. Can date a voyage's effects on farming and forests without any document at all.",{"id":1035,"type":50,"variant":1036,"title":1037,"markdown":1038},"q-whose-story","question","Whose account survived, and whose did not?","Count the sides of the story for the voyages in this lesson.\n\n- **Columbus's own log** does not survive. What we have is an abstract copied out by Bartolome de las Casas decades later.\n- **Da Gama's voyage** is known partly from an anonymous crew journal, the Roteiro.\n- **Magellan's expedition** has Antonio Pigafetta's journal, kept by a man who sailed the whole way and came home.\n- **Zheng He's fleets** left two stone inscriptions, put up by Zheng He himself. The detailed fleet records did not survive.\n- **Ibn Battuta** dictated his travels in 1355 after he stopped travelling.\n- **Calicut's own account of 20 May 1498**, written by someone who stood on that shore: we have nothing.\n\nFive of those six are the traveller's account. Ask yourself, every time you read about a first meeting: **who wrote this down, how long afterwards, and who were they writing for?**",{"id":1040,"type":897,"conceptId":1041,"relation":899,"explanation":1042},"conn-data","data-handling","Judging which population estimate to trust, and why a range is more honest than one number, is exactly the skill of reading data: spread, average and where the figures came from.",{"id":1044,"type":897,"conceptId":1045,"relation":1046,"explanation":1047},"conn-shape","shape-and-space","applied_in","Every chart is geometry: a round Earth flattened onto flat paper. No flat map can keep shape, area and direction all correct at once.",{"id":1049,"type":56,"title":1050,"eyebrow":1051,"navLabel":1052},"ch10","Words worth knowing","Chapter 10","10 Vocabulary",{"id":1054,"type":1055,"title":1056,"terms":1057},"gloss-discover","glossary","Words for this topic",[1058,1062,1065,1069,1073,1076,1079,1082,1085,1088,1091,1094,1097,1100],{"term":1059,"meaning":1060,"example":1061},"Exploration","Travelling somewhere to find out what is there.","Cook's first voyage explored the south Pacific.",{"term":1063,"meaning":1064},"Discovery","Finding something genuinely unknown to anyone. Use it carefully about places, which usually had people in them already.",{"term":1066,"meaning":1067,"example":1068},"Encounter","A meeting between groups who did not know each other before.","1498 at Calicut was an encounter, not a discovery.",{"term":1070,"meaning":1071,"example":1072},"Latitude","How far north or south of the equator you are, in degrees. Measurable from the Sun or the Pole Star.","Kozhikode is about 11 degrees north.",{"term":1074,"meaning":1075},"Longitude","How far east or west you are, in degrees. Much harder to measure: it needs an accurate clock.",{"term":1077,"meaning":1078},"Monsoon","A wind that reverses direction between summer and winter, and the rains it brings. The Indian Ocean's sailing timetable.",{"term":1080,"meaning":1081},"Compass","A magnetised needle that settles pointing roughly north, so you can steer in cloud or at night.",{"term":1083,"meaning":1084},"Kamal","A wooden card on a knotted cord, used by Indian Ocean sailors to measure a star's height above the horizon.",{"term":1086,"meaning":1087},"Astrolabe","An instrument for measuring the angle of the Sun or a star above the horizon.",{"term":1089,"meaning":1090},"Columbian exchange","The two-way movement of crops, animals and diseases between the Americas and the rest of the world after 1492.",{"term":1092,"meaning":1093},"Trading company","A company given a charter by its government to trade in a region, sometimes with its own ships, forts and soldiers.",{"term":1095,"meaning":1096},"Immunity","A body's ability to resist a disease it has met before. The peoples of the Americas had none to smallpox or measles.",{"term":1098,"meaning":1099},"Indigenous","Belonging to a place from long before outsiders arrived.",{"term":1101,"meaning":1102,"example":1103},"Estimate","A carefully worked-out figure that is not a count. Good estimates come with a range.","Population estimates for 1492 range from 8 to over 100 million.",{"id":1105,"type":50,"variant":1036,"title":1106,"markdown":1107},"q-open","Questions to take away","No single right answer to any of these. They are for arguing about.\n\n- If a place already had people in it, what is the honest word for what happened when a ship arrived?\n- Zheng He's fleets stopped in 1433. What would the world look like now if they had not?\n- Chillies took over Indian cooking in about two hundred years. What food that feels completely normal to you today arrived recently?\n- Who should decide what happens in Antarctica, or on the deep sea floor, or on the Moon?\n- Whose account of a first meeting would you most want to read, and why do you think it does not exist?\n- Is there anywhere left on Earth that has not been explored? What about places we have mapped but barely visited?",{"id":1109,"type":1110,"title":1111,"questions":1112},"quiz-discover","quiz","Check what stuck",[1113,1126,1139,1152,1165,1178,1191],{"itemId":1114,"prompt":1115,"options":1116,"correct":129,"why":1125},"exploration.discover-q-discovery","Why do historians avoid saying Columbus *discovered* America?",[1117,1119,1121,1123],{"id":126,"label":1118},"Because someone else got there first in 1491",{"id":129,"label":1120},"Because the Americas were already home to tens of millions of people with their own cities, farms and names for places",{"id":132,"label":1122},"Because he never actually landed",{"id":135,"label":1124},"Because the word is too old-fashioned","Discovery means finding something nobody knew about. Every place he reached was somebody's home. *Encounter* is the honest word.",{"itemId":1127,"prompt":1128,"options":1129,"correct":132,"why":1138},"exploration.discover-q-reason","Which of these is a **reason** people set out, rather than a consequence?",[1130,1132,1134,1136],{"id":126,"label":1131},"Chillies became common in Indian cooking",{"id":129,"label":1133},"Smallpox spread through the Americas",{"id":132,"label":1135},"Pepper was worth many times more in Europe than in Kerala",{"id":135,"label":1137},"European maps became far more accurate","The price gap came first and made the voyage worth attempting. The other three all happened because voyages were made.",{"itemId":1140,"prompt":1141,"options":1142,"correct":132,"why":1151},"exploration.discover-q-zhenghe","Between 1405 and 1433, Ming China sent 7 great fleets west, and then stopped. What does that tell us?",[1143,1145,1147,1149],{"id":126,"label":1144},"The ships were not good enough to continue",{"id":129,"label":1146},"They never reached anywhere important",{"id":132,"label":1148},"Exploring is a choice, and stopping is a choice too",{"id":135,"label":1150},"China had no interest in trade","The fleets reached Calicut, Hormuz and east Africa. The Ming court decided the cost was not worth it and turned to its land borders instead.",{"itemId":1153,"prompt":1154,"options":1155,"correct":129,"why":1164},"exploration.discover-q-disease","Why did diseases such as smallpox spread so catastrophically in the Americas after 1492?",[1156,1158,1160,1162],{"id":126,"label":1157},"The diseases were new kinds that had never existed anywhere",{"id":129,"label":1159},"The peoples of the Americas had been separated from these diseases for thousands of years and had no previous exposure",{"id":132,"label":1161},"The climate made them worse",{"id":135,"label":1163},"Nobody there had any medicine","They were old diseases in Europe, Asia and Africa, where many people had some immunity. In the Americas they met populations that had never encountered them.",{"itemId":1166,"prompt":1167,"options":1168,"correct":129,"why":1177},"exploration.discover-q-range","Why do good history books give a **range** for the population of the Americas in 1492, instead of one number?",[1169,1171,1173,1175],{"id":126,"label":1170},"Because historians are lazy",{"id":129,"label":1172},"Because nobody counted at the time, so every figure is a reconstruction and different methods give very different answers",{"id":132,"label":1174},"Because the number changes every year",{"id":135,"label":1176},"Because ranges look more scientific","Published estimates run from about 8 million to over 100 million. A single confident number would be hiding a real argument.",{"itemId":1179,"prompt":1180,"options":1181,"correct":129,"why":1190},"exploration.discover-q-diwani","What changed in 1765, when the East India Company was granted the diwani of Bengal?",[1182,1184,1186,1188],{"id":126,"label":1183},"The Company was allowed to trade in Bengal for the first time",{"id":129,"label":1185},"The Company gained the right to collect Bengal's land revenue, so a trading company became a government",{"id":132,"label":1187},"The Company left India",{"id":135,"label":1189},"The British Crown took over directly","Collecting the revenue meant taxing millions of people. Crown rule came much later, in 1858.",{"itemId":1192,"prompt":1193,"options":1194,"correct":132,"why":1203},"exploration.discover-q-evidence","Whose account of the meeting at Calicut on 20 May 1498 has **not** survived?",[1195,1197,1199,1201],{"id":126,"label":1196},"A journal kept by someone on the Portuguese ships",{"id":129,"label":1198},"Portuguese royal correspondence",{"id":132,"label":1200},"An eyewitness account written by someone standing on the Calicut shore",{"id":135,"label":1202},"Later Portuguese chronicles","We have the travellers' side and almost nothing of the shore's. That imbalance runs through the whole history of exploration.",{"id":1205,"type":1206,"title":1207,"points":1208},"summary-discover","summary","The short version",[1209,1210,1211,1212,1213,1214,1215,1216,1217,1218],"**Exploration** is travelling to find out what is there. **Discovery** is a loaded word for places: they nearly always had people in them already. **Encounter** is usually the honest one.","People set out for six overlapping reasons: **curiosity, trade and wealth, religion and pilgrimage, escape and migration, rivalry between rulers, and accident.** Most voyages had several at once.","The **Indian Ocean** was a busy, organised trading world for over a thousand years before Europeans arrived. The Periplus, a merchant's handbook, dates from about about 40-70 CE.","The **monsoon** reverses twice a year: south-west about June to September, north-east about November to February. It gave the ocean a timetable and made a round trip take roughly a year.","Navigation used the **Pole Star and Sun** for latitude, the **compass** for direction, the **kamal, astrolabe and lead line** for measuring, and careful dead reckoning. Longitude stayed unsolved for centuries.","**Zheng He** (1405-1433, 7 fleets), **Columbus** (1492), **da Gama** (Calicut, 20 May 1498, with a pilot hired at Malindi) and **Magellan-Elcano** (1,082 days round the world) are the four to know.","The **Columbian exchange** moved crops both ways: chilli, potato, tomato, maize and cashew are American, reaching India after early 1500s; wheat, sugarcane, coffee, horses and cattle went the other way.","Disease killed a large share of the Americas' population (most estimates **about 85-95% on most estimates**), and about **12.5 million** African people were embarked on slaving ships between 1501 and 1866. Every such figure is a reconstruction, so it comes as a range.","In India, trading companies became rulers: charters in 1600 and 1602, the diwani of Bengal in 1765, Crown rule in 1858, independence in 1947. Always ask **who gained and who paid**.","We know all this from **logs, port records, charters, archaeology, oral histories and laboratory science**. The travellers' accounts survived far more often than the shore's.",{"id":1220,"type":1221,"sourceIds":1222},"sources-discover","sources",[1223,1224,1225,1226,1227,1228,1229],"exploration-britannica-vasco-da-gama","exploration-britannica-zheng-he","exploration-britannica-columbian-exchange","exploration-wiki-periplus","exploration-wiki-americas-population","exploration-slavevoyages-estimates","exploration-faostat-crops",[1223,1224,1225,1226,1227,1228,1229],"needs_review",{"generatedBy":1233,"notes":1234},"claude-code","Draft generated locally; pending owner review. Every number computed and asserted in scratchpad\u002Fexploration\u002Fnumbers.py. Contested figures (Americas population 1492 and its decline, Bengal famine deaths, India's share of world manufacturing) are given as ranges with an explicit note that they are estimates.","41e7dbea743869ed18e5450036f990cab15b0e44518edd556090e6c0f681a058",{"logic:practice":1237,"component:sort-game@1":1238,"component:voyage-map@1":1239,"component:match-pairs@1":1240,"source:exploration-britannica-columbian-exchange":1241,"source:exploration-britannica-vasco-da-gama":1242,"source:exploration-britannica-zheng-he":1243,"source:exploration-faostat-crops":1244,"source:exploration-slavevoyages-estimates":1245,"source:exploration-wiki-americas-population":1246,"source:exploration-wiki-periplus":1247},"3d6b0fe1b15255975a32b0fcd94e8019bc959ad45cbf12e136e86149549c6878","b164f45a2c8ca08f26c450768ff0231e113e9fe45381eddb34dc6d0548596c38","39a0c4da8ea3e6637b0b63d8c38cb151ee52e167eae571f75affe7452f56f13a","2a8ee4ac87460b4e1175a4bb13c96b03d577db06dde95670eb7fcfe4ad787899","173af9ca657a131f5eaa9b5aadfbbb7aa1b4811b819ea914262fbb9f5d537944","e054215ae428cfb850b8b8daf570a0985e9ba2947d2d76f0d749b0fcac1ee180","b637778770519d258063cb94693d79fc289531d021d4ba136468117af61e1dca","8ca639dc2c65eff47d94448dc51b0cc1edc002ee81953a0a2fc1539a59e29a0a","d052ec4ecb2082c5f45811a3fddde9db35ef46c27a8109e7dc119e27c48480ac","0b0e6f85230ee89d0d7dc39590470f0282baad1c9e65aa9e7b0a3c8dfd0c021c","dca5e18a4b6295658748ff81b58653f6e24948c3f4d174c3763e478396e53da5",{"state":1249,"reviewer":1250,"selfReview":487,"reviewedAt":1251,"method":1252},"approved","The library owner","2026-09-20T10:18:37.581Z","owner_bulk","preview-7e1cbbcc4f",1789899597976]