By then, other Eastern Seaboard cities had great harbors, but none had a comparable water tributary to the expanding interior of the United States.
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In 50 years, New York City had grown from 120,000 people to more than a million in 1870. What historians called “a river of gold” flowing into the city’s lap had also proved to be a triumph of a fledgling democracy and capitalism, said James S. Kaplan, president of the Lower Manhattan Historical Association. What was known as the Great Western Canal exported New York’s politics and principles to the rest of the nation.
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The canal affirmed New York’s political ascendancy over Virginia and the rest of the South (four of the first five presidents were Virginians) and its commercial dominance over competing ports not just on the Eastern Seaboard, but all the way to New Orleans.
No wonder that in his “Wedding of the Waters: The Erie Canal and the Making of a Great Nation” (2005), Peter L. Bernstein wrote: “A town with an imperial name was about to witness the birth of a project that would turn New York into an imperial state.”
https://www.nytimes.com/2017/06/26/nyregion/history-of-the-e...