What was the environment that created the need for the Sherman Act AntiTrust Act in 1890?

Sherman Antitrust Act, first legislation enacted by the U.S. Congress (1890) to curb concentrations of power that interfere with trade and reduce economic competition. It was named for U.S. Sen. John Sherman of Ohio, who was an expert on the regulation of commerce. John Sherman, senator from Ohio.

the decreasing neutrality of the u. s. in world war i

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b: the exchange of coined money