How did the need for more industrial production during the war shape the modern American economy? How did it change where population centers are in the country—is it the same today?

In simple words, Apprenticeships for craftsmen were no longer needed with the rise of industrial development, and labor became discommoded. The Industrial Revolution has resulted in the widespread proliferation of low-cost goods, ushering in a commercial society that signaled the end of many urban Americans' traditional lifestyles. The Industrial Development exemplifies the concept of scale economies. Increased output of products, as per this theory, increases overall productivity.

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map scale refers to the relationship (or ratio) between distance on a map and the corresponding distance on the ground. for example, on a 1: 100000 scale map, 1cm on the map equals 1km on the ground.