During the Second World War, the United States honed an extraordinary suite of technologies that gave it many of the benefits of empire without having to actually hold colonies. Plastics and other synthetics allowed it to replace tropical products with man-made substitutes. Airplanes, radio, and DDT enabled it to move its goods, ideas, and people into foreign countries easily without annexing them. Similarly, the United States managed to standardize many of its objects and practices—from screw threads to road signs to the English language—across political borders, again gaining influence in
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