The documents discuss the history and purpose of antitrust laws in the United States. The Sherman Antitrust Act was passed in 1890 as the first antitrust law, prohibiting monopolies and trusts that could artificially reduce supply and increase prices. It aimed to promote competition by preventing competitors from forming agreements or monopolies that restricted trade. Subsequent acts like the Clayton Act added further restrictions on mergers and pricing practices. Enforcement of antitrust law seeks to ensure fair competition in the belief that it benefits the economy, businesses, and consumers.