What happened
In 1890, the United States enacted the Sherman Antitrust Act. It prohibited combinations restraining interstate or foreign trade and addressed monopolization, creating a federal instrument against concentrated commercial power.
How we know it
The statute’s text is preserved by the National Archives. It states prohibitions in broad terms, so reading the act alone cannot establish how every later business arrangement would be treated.
Why it went that way
The measure responded to concerns about trusts and economic concentration. Federal legislation addressed conduct extending beyond individual states, where purely local regulation faced obvious limits.
What is still contested
Passing a prohibition and enforcing it effectively are different outcomes. Disagreement over the reach of its language became central to its history; the statute did not supply a mechanical test for every dispute.
What it changed
The act established a lasting federal framework for challenging restraints on trade. Its practical meaning developed through litigation and enforcement rather than being exhausted by its passage.
Is it worth your time
Worth understanding as an institutional response to economic power. Begin with what the law prohibited, then examine a particular case before drawing conclusions about its success or the behavior it reached.
