Which period saw the most rapid increase in urbanization in the eastern united states?

Urbanization occurred rapidly in the second half of the nineteenth century in the United States for a number of reasons. The new technologies of the time led to a massive leap in industrialization, requiring large numbers of workers. New electric lights and powerful machinery allowed factories to run twenty-four hours a day, seven days a week. Workers were forced into grueling twelve-hour shifts, requiring them to live close to the factories.

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independent innovation during the abbasid caliphate