What term best describes the us government polices towards business in the late 19th century?

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The period indicated, that is, the end of the nineteenth century, is based on a government that sought to regularize capitalist operations in order to prevent unfair competition. A term that could describe the period is "reformer", in the sense in which it sought to preserve the economic structure, although it has fought against industrial monopolies.

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1is that it separated familys