Monsoon-wind navigation opens direct Indo-Roman Indian Ocean trade

Date

c. 30 BCE (1st century BCE)

Category

Economy & trade

Region

South Asia

Era

Classical Antiquity

Significance

In the 1st century BCE, Greek and Roman navigators—tradition credits the pilot Hippalus—learned to exploit the seasonal reversal of the Indian Ocean monsoon, sailing east on the southwest monsoon in summer and returning west on the northeast monsoon in winter.

This allowed ships to cross the open ocean directly from the Red Sea ports of Roman Egypt (Berenike and Myos Hormos) to the western coast of India, bypassing the slow, coast-hugging routes used under the Ptolemies. After Augustus annexed Egypt in 30 BCE the route became systematic: Strabo reports that as many as 120 ships sailed annually from Myos Hormos to India, where Roman traders exchanged gold, silver, glass, wine, and coral for pepper, spices, gems, ivory, fine textiles, and Chinese silk at emporia such as Muziris and Barygaza. The resulting high-volume luxury trade generated enormous revenue but drained Roman precious metals eastward, prompting Pliny the Elder to lament that India, China, and Arabia drew some 100 million sesterces from the empire each year. The monsoon route became one of antiquity's most important maritime trade systems, linking the Mediterranean economy to South Asia for centuries.

Empires active in c. 30 BCE (1st century BCE)

• Indo-Greek Kingdom
  180 BCE – 10 CE
• Satavahana Dynasty
  230 BCE – 220 CE
• Han Dynasty
  202 BCE – 220 CE
• Roman Republic
  509 BCE – 27 BCE
• Parthian Empire
  247 BCE – 224 CE
• Xiongnu Confederation
  209 BCE – 93 CE

Related economy & trade events

• Monsoon-Driven Indo-Roman Sea Trade Boom (Periplus Era)
  c. 50 CE (Periplus era, monsoon route established c. 45-47 CE)
• Salt and Iron Debate at the Han Court
  81 BCE
• Sangam-Age Tamil Kingdoms and the Muziris Pepper Trade
  c. 100 BCE – 200 CE
• Crisis of the Third Century and the Collapse of the Roman Denarius
  235–285 AD
• Aksum Issues Its First Coinage under King Endubis
  c. 270 CE
• Diocletian's Edict on Maximum Prices
  301 CE

Further reading

The Silk Roads: A New History of the World

The wider story

The Silk Roads: A New History of the World

Peter Frankopan

Best-selling world history told through the trade routes that moved goods, faiths and ideas.

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