While a few oil-rich nations like Saudi Arabia have achieved very high standards of living without ever having embraced manufacturing, almost every other developed country in the world, from Britain and the United States to Japan to South Korea and China, has transformed its economy with factories. Increased wealth from manufacturing is what allows nations to build the roads, power plants, electricity grids, flood control, sanitation, and waste management systems that distinguish poor nations like Congo from rich nations like the United States. Cities, meanwhile, concentrate human populations
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