1. Post Civil War
... the South led them to become even more socially and structurally isolated from the Northeast and West. These new innovations in transportation also had economic effects on America. Water transportation such as the steamboat and canal, and later the railroad played a key role in helping to economically tie the three regions together. Because the three regions had economies that supplemented each other, the ... all levels of government to figure out what their responsibilities were on these issues. The population boom in the nineteenth century caused by immigration had far-reaching struct...
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