Old World & New World · Article 2 of 22 · c. 750–1450
A connected Old World before the Atlantic crossing
People & builders: Al-Khwarizmi (c. 780–850); Ibn Battuta (1304–1368/69); Mansa Musa (reigned c. 1312–1337); Zheng He (1371–1433)
Knowledge crossed political borders
In ninth-century Baghdad, scholars including al-Khwarizmi worked within the Abbasid intellectual world, synthesizing and extending mathematical traditions. His writings on calculation and algebra eventually reached Latin-reading Europe through translation. Chinese paper and printing technologies, developed in different periods, helped information travel further. Such developments were not the work of one civilization passing a finished gift to another. Translators, merchants, craftspeople and students all shaped how knowledge moved.
West African gold passed through Saharan networks to North African and Mediterranean markets. Mansa Musa's 1324 pilgrimage to Mecca drew attention to the wealth of Mali, but Mali was also a place of agriculture, administration and scholarship. Timbuktu acquired importance through overlapping commercial and intellectual routes. The names and organizations of these routes changed across centuries, yet no single kingdom controlled the whole network.
The Indian Ocean was a working highway
Seasonal monsoon winds linked ports in East Africa, Arabia, the Indian subcontinent, Southeast Asia and China. Swahili merchants on the East African coast negotiated with sailors whose languages, religions and goods varied. The Moroccan traveler Ibn Battuta visited much of this connected world in the fourteenth century. His record is invaluable but reflects a traveler’s own assumptions, not a complete account of every people he encountered.
Between 1405 and 1433, Ming fleets under Zheng He sailed through the Indian Ocean, reaching South and Southeast Asia and East Africa. Their voyages demonstrated formidable Chinese shipbuilding and diplomatic capacity without inaugurating a permanent Chinese naval empire in the Atlantic. The Atlantic expansion of Portugal in the next century was built in a world where established Asian and African trading systems were already operating.
Networks survived conquest but could transmit catastrophe
Caravan routes and port cities depended on protection, contracts, water supplies and trusted intermediaries. Changes in dynasties or warfare could redirect commerce, while the movement of travelers could carry infection across immense distances. The fourteenth-century plague was not the first disease to exploit connected routes, but it showed the danger of networks upon which many cities depended.
Modern global supply chains have ancestors in these interregional systems, even though their technology and scale are entirely different. What survives from the older order is evidence that globalization did not begin with Western Europeans; what was lost in later imperial expansions was often the autonomy of ports and merchants who had already sustained exchange for generations.
Dates & turning points
- c. 820: Al-Khwarizmi produces influential mathematical works in Abbasid Baghdad.
- 1324: Mansa Musa travels to Mecca through North Africa.
- 1325–1354: Ibn Battuta travels across much of the Afro-Eurasian commercial world.
- 1405–1433: Zheng He leads Ming-sponsored ocean voyages.