"The Motor City" takes it's name from the central role it played in the automotive industry. When Henry Ford changed the assembly line system in the 20s, enabling mass production, cars were considerably cheaper, leading to a significant increase in sales. When all the wheels of economy spin, the city thrives. In Detroit this phenomenon took place very quickly. In the 50s, with about two million residents, Detroit became the third largest U.S. city.
Detroit city started collapsing too, as a side effect of hanging by a strong cord on the automotive industry.
Detroit was abandoned, while the few buildings that still worked, choked trying not to let the mass closures affect them. Detroit seemed to be on the verge of collapse.
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