Indian Ocean Trade Slides

South Asia centered in the Indian Ocean; benefited greatly from basin trade.
Causes similar to overland trade expansion, plus ocean-specific factors.
Spread of Islam: the biggest driver of IO growth; connected more cities than before.
Muslim Persians and Arabs were dominant seafarers; merchants pivotal in transporting goods to port cities.
As Islam spread, traders encountered like-minded communities, easing trade.
Muhammad described as a merchant first, reinforcing merchant status in Arab culture.
West Indian ports like Calicut and Bombay grew into thriving trade centers; foreign Muslims and Chinese merchants met there.
Local rulers welcomed Muslim and Chinese merchants for wealth and prominence in the IO Basin.

India:
- High-quality fabrics, cotton; sought meticulously woven carpets; high-carbon steel; tanned leather; artisan stonework; pepper from southern coasts.
Spice Islands (Malaysia & Indonesia): nutmeg, cinnamon, cloves, cardamom.
Swahili city-states (Mombasa, Sofala, etc.): slaves, ivory, gold.
China: silks; porcelain.
Arab world: horses, figs, dates, coffee.

Enslaved people played a role across the IO; large-scale slave trade peaks in the 18th–19th centuries.
Origins mainly from eastern Africa; routes to northern Africa, the Middle East, and India; Madagascar as a major destination.
IO slavery involved labor in seaports, households, sailors, and soldiers; enslaved people lived in towns with some integration.
Some rights existed in Islamic communities (e.g., marriage).
Cultural impact: African words, music, and customs in Oman, India, and elsewhere.

Monsoon winds essential for IO trading: NE winds in winter; SW winds in spring/summer.
Merchants timed voyages, often staying in port cities for months awaiting favorable winds.
Maritime technology spread widely:
- Triangular lateen sails improved wind catch from different directions.
- Stern rudder (Chinese invention) increased stability and maneuverability.
- Dhows dominated by Arab and Indian sailors.
- Astrolabe improved in the 12th century to measure latitudinal position.
Overall spread of sailing tech across IO facilitated rapid trade.

IO trade networks fostered state growth to institutionalize revenue from trade.
Malacca Sultanate (Srivijaya’s influence declined); wealth built via navy and fees through the Strait of Malacca.
Malacca became powerful in the 1400s, expanding into Sumatra and the Malay Peninsula.
Prosperity based on trade rather than agriculture/mining/manufacturing.
Portuguese conquest of Malacca in 1511 disrupted regional balance, prompting route diversification.

Diaspora: migrants and long-term settlements of merchants in port towns.
Arab and East African merchants often settled in western Indian Ocean ports; intermarriage with locals.
Islam spread through intermarriage and settlement, not solely by missionary action.
Diasporic regions and products:
- Arabian Peninsula: horses, coffee, figs, dates
- Chinese coast: cotton, tea, silk, metals, porcelain
- Spice Islands: nutmeg, cloves, pepper, cardamom
- Sri Lanka: nutmeg, pepper, cloves
- Swahili coasts (Africa): slaves, ivory, gold
- India (Rajput & southern regions): cotton, leather, pepper
Cultural transfers intensified as trade grew; Islamic culture left lasting imprints in IO

1405 onward: Ming Dynasty under Yongle dispatched seven voyages led by Zheng He.
Voyages to Indonesia, Sri Lanka, Arabia, East Africa, and the Cape of Good Hope; involved tribute exchanges.
Fleet at peak: > $300$ ships carrying > $28{,}000$ people.
Purposes: display Ming power, establish markets, collect tribute; pirate activity decreased in some regions.
Brought back exotic goods (e.g., giraffe) and broadened worldviews; inspired some migration to IO ports.
Confucian scholars criticized the voyages; the next emperor suppressed further expeditions, ending long-range maritime exploration.

Enhanced prestige of the Chinese government; opened new markets for Chinese goods.
Trade networks reduced piracy temporarily but later resumed after expeditions ended.
Greater intercultural understanding and exchange, though some elites viewed external cultures as threatening to social order.

IO trade produced wealthy East African city-states along the Zanj Coast (Kilwa, Mombasa, Zanzibar).
Goods exchanged: ivory, gold, slaves for Chinese porcelain, Indian cotton, ironware.
Wealth enabled monumental architecture (mosques and merchant homes built from stone or coral).
Exchange with East Asia was intense; porcelain remains a hallmark of Swahili sites.

IO trade accelerated transfer of knowledge, technology, commerce, and religion.
Zheng He epitomizes the era of transregional exchange.
Maritime networks connected diverse peoples and facilitated cross-cultural interactions.

Similarities:
- Both connected distant regions through extensive merchant networks; diasporic communities emerged; goods and ideas circulated widely.
Differences:
- Indian Ocean trade was predominantly maritime with monsoon-driven routes and advanced sailing technology; Silk Roads were overland networks.
- IO trade featured significant Islamic cultural transmission and diasporic port cities; Silk Roads emphasized caravan networks and land-based cultural exchanges.

Monsoon winds, lateen sails, stern rudder, dhow, astrolabe
Swahili city-states, Kilwa, Mombasa, Zanzibar
Srivijaya, Malacca Sultanate, Strait of Malacca
Zheng He, Ming Treasure Fleet, 1405–1433
Spice Islands, nutmeg, cloves, pepper, cardamom
Diaspora, intermarriage, Islam as a catalyst for exchange
Trade goods: textiles, pepper, silk, porcelain, metals, horses, coffee, slaves, ivory, gold