Between roughly 1100 and 1700, Italian city-states invented the instruments of modern commerce — double-entry bookkeeping, the bill of exchange, marine insurance, deposit banking, the joint-stock company — and European trade expanded from local markets to oceanic routes. The Hanseatic League and the Champagne fairs knit regional economies; the Age of Exploration shifted commercial gravity from Venice to Amsterdam and London. These instruments were morally indifferent. The same ledgers, insurance policies, and company charters that built modern finance also underwrote colonial conquest and the Atlantic slave trade. The wealth and the violence grew from the same root.
Long before the first factory, Europe learned how to do business. Between roughly 1100 and 1700, a mostly rural, locally rooted economy slowly became one of banks, companies, ledgers, and global markets. Italian merchants worked out double-entry bookkeeping. Bankers invented paper credit that let money move without coins ever leaving a vault. Insurance spread risk so a single shipwreck would not ruin a trader. The joint-stock company let strangers pool their money and share the profits and losses of a venture, like the Dutch and English East India Companies. This is the Commercial Revolution, and it built the financial machinery the modern world still runs on. But that machinery was not innocent. The very same companies, credit, and insurance that built modern finance also bankrolled the conquest of the Americas, the plantation system, and the Atlantic slave trade, in which human beings were bought, shipped, and even insured as cargo. The wealth and the violence grew from the same root.