Trust: A trust is an arrangement where multiple companies merge together under one controlling entity to eliminate competition and create a monopoly.
Sherman Antitrust Act: The Sherman Antitrust Act was passed in 1890 to prevent monopolies and promote fair competition by prohibiting any actions that unreasonably restrained trade.
John D. Rockefeller: John D. Rockefeller was an industrialist who gained massive wealth through his oil company, Standard Oil, which became notorious for its monopoly power over the oil industry during the Gilded Age.