Atlantic Slave Trade Goods (Triangular Trade Cargo)

Timeline

1. 1440–1600West African coast (Senegambia to Angola) · West-Central AfricaIn 1441 Portuguese navigators brought back the first group of enslaved West Africans; thereafter a trade goods system gradually formed, combining textiles (Moroccan cloth, Indian cotton), copper goods (manilla anklets), European knives, alcoholic beverages, and glass beads. Portuguese merchants negotiated with local African chiefs and brokers, exchanging fixed assortments of goods for the enslaved. By the end of the 16th century, Portugal had transported about 1 million Africans to Brazil and the Caribbean via transatlantic trade; the goods system had taken shape but was not yet standardized.
2. 1621–1630West Africa (Gold Coast, São Tomé) and Amsterdam, Netherlands · Gold CoastThe Dutch West India Company (WIC) was founded in 1621, obtaining a state-chartered monopoly on trade in West Africa and the Americas. The WIC quickly seized Portuguese strongholds in West Africa by force (such as Elmina Castle in 1637) and systematically organized the types and measurement standards of slave trade goods. Between 1621 and 1630, the WIC used large quantities of Indian cotton (imported via the VOC), iron bars (about 50 cm long, for making farm tools and weapons), copper manillas (anklet currency), Dutch gin, and glass beads to exchange for enslaved people in West Africa, transporting them to plantations in Pernambuco, Brazil. This stage marked the quantification and listing of slave trade goods.
3. 1640–1700Atlantic coasts (West Africa, Europe, Americas triangle) · AmericasAfter the 1640s, with the entry of the British Royal African Company (after 1660) and the French Senegal Company, among others, the Atlantic slave trade goods system fully matured. Merchants of each nation developed the practice of the "assortment": a fixed combination of a certain quantity of cloth, iron bars, firearms, rum, and cowries as one exchange unit (a "bar"), used as the pricing standard in negotiations with African suppliers. Iron bars, copper manillas, Indian printed cotton, glass beads, flintlock muskets, and tobacco became the most stable core trade goods, their specifications fixed through joint negotiation between European merchants and African middlemen. This goods system made the scaling and industrialization of the slave trade possible; between the 17th and 18th centuries, about 12 million Africans were forcibly transported to the Americas.