Which method of transit has had the biggest impact on world trade in the twenty-first century?

Container ships have had the biggest impact on world trade in the twenty-first century because they move enormous quantities of goods efficiently between countries. Standardized containers can be transferred easily between ships, trucks, and trains, making global shipping faster and cheaper. Railroads, canals, and steam boats mattered greatly in earlier periods, but container ships are central to modern international trade.

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