I believe that the answer to the question provided above is because of industrial revolution US shipping industry flourish in the late 1700's
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I think the developments in american society that encouraged reformers to seek change that led to the progressive movement were :
- The enlightenment
- Industrial evolution
The enlightenment moved the geared toward science based society, and the industrial revolution change the way we do our business production<span />
Steam-powered ships were ran by steam and sailboats were ran by the wind.
The right to have guns/bear arms