Sherman Antitrust Act
1890 U.S. anti-monopoly law
The Sherman Antitrust Act (26 Stat. 209, 15 U.S.C. §§ 1–7) is a United States antitrust law which prescribes the rule of free competition among those engaged in commerce and consequently prohibits unfair monopolies. It was passed by Congress in 1890 and is named for Senator John Sherman, its principal author.
The Sherman Act broadly prohibits 1) anticompetitive agreements and 2) unilateral conduct that monopolizes or attempts to monopolize the relevant market. The Act authorizes the Department of Justice to bring suits to enjoin (i.e., prohibit) conduct violating the Act, and additionally authorizes private parties injured by conduct violating the Act to bring suits for treble damages (i.e. three times as much money in damages as the violation cost them). Over time, the federal courts have developed a body of law under the Sherman Act making certain types of anticompetitive conduct per se illegal, and subjecting other types of conduct to case-by-case analysis regarding whether the conduct unreasonably restrains trade.
The law attempts to prevent the artificial raising of prices by restriction of trade or supply. "Innocent monopoly," or monopoly achieved solely by merit, is legal, but acts by a monopolist to artificially preserve that status, or nefarious dealings to create a monopoly, are not. The purpose of the Sherman Act is not to protect competitors from harm from legitimately successful businesses, nor to prevent businesses from gaining honest profits from consumers, but rather to preserve a competitive marketplace to protect consumers from abuses.
Begin with the source’s own compact description: “Sherman Antitrust Act” is 1890 U.S. anti-monopoly law. The dossier treats that line as a proposition to test through Sherman, Antitrust and anti-monopoly, not as a finished interpretation.
Why this record matters
The phrase “1890 U.S. anti-monopoly law” supplies a clear boundary for inquiry. It also exposes the unanswered questions: who defined that boundary, when it became stable and which sources sit outside it.
Chronology, provenance and viewpoint should be read together before a broad social or political interpretation is accepted. The source revision retrieved here is dated Sep 18, 2026. The linked authority identifier is Q1425088. The first chronological checks are 1890.
Official terminology may obscure informal participation, dissent or communities documented only indirectly. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
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Three-step research path
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This entry incorporates text from “Sherman Antitrust Act” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.