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Today I Learned Science · Jun 18, 2026

HOW A PIECE OF PAPER RULED THE WORLD FOR 4000 YEARS

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Dr. Harini Bhat · Today I Learned Science


A single tanker can be turned away from the Strait of Hormuz without a single shot fired, if the right piece of paper goes missing. That paper is an insurance contract, and the system behind it is nearly 4,000 years old, stretching back to risk-sharing contracts in ancient Babylon. Then Lloyd’s of London turned it into a global infrastructure. Today, it quietly decides whether oil tankers can legally cross one of the world’s most contested waterways on the planet. Most people assume the Strait could only be closed by missiles or mines. The truth is stranger: it can be closed by underwriters. We trace that 4,000-year throughline, and what it means for the Gulf right now, in the full video.

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