The Silver Problem
Britain's trade with China in the early 19th century was structurally imbalanced in China's favour — and the monetary consequence of that imbalance was a silver drain that threatened the foundations of British commerce. Understanding the silver problem is essential to understanding why Britain went to war with China twice.
The Tea Trade and the Balance of Payments
Chinese porcelain, silk, and above all tea were in high demand among British consumers by the late 18th century. The East India Company held a monopoly on the China trade. The problem: China wanted almost nothing Britain produced. The Qing emperor Qianlong made this explicit in his famous 1793 letter to King George III: "Our Celestial Empire possesses all things in prolific abundance and lacks no product within its own borders. There was therefore no need to import the manufactures of outside barbarians."
Payment had to be made in silver — China's preferred monetary metal. Britain was purchasing approximately 23 million pounds of tea annually by 1800, requiring enormous silver outflows. The East India Company's silver reserves were being depleted, and the London silver market was being strained.
The Monetary Mechanics
The silver problem was fundamentally a balance of payments crisis expressed in monetary terms. Under the gold and silver monetary standards of the period, an imbalance of trade produced a physical movement of metal. Countries that bought more than they sold exported silver; countries that sold more than they bought accumulated it.
Britain was exporting silver to China without a compensating flow of goods in the opposite direction. This reduced British monetary reserves and — since silver was the basis of India's monetary system and much of Britain's Asian trade — threatened the entire commercial structure of the East India Company's empire.
A solution that kept silver in Britain was a commercial and monetary imperative. The East India Company found one: opium.