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How Did The Skyward Rise Of The Steel Industry

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There are 3 major factors that contributed to the skyward rise of the American steel industry. The first was a major increase in demand for steel to accommodate the westward expansion, second immigration created an influx of cheap unskilled labor, and finally technological advances in the manufacturing of steel.
In 1860 the United States had approximately 29,000 miles of railroads; by 1900 this number had increased to 163,000 miles of active railroad.(archive.org) The first transcontinental railroad was finished in 1869. The sheer amount of steel required to build all of the railroads created an astronomical demand for steel. (Henretta, James A.., and Robert O. Self.)
Between 1877 and 1900 over 20 million people immigrated to the America.
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