The U.S. Supreme Court case Standard Oil Company (Indiana) et al. v. United States in 1930 revolved around the Sherman Antitrust Act, which prohibits certain business activities deemed to be anti-competitive or monopolistic. The government accused the Standard Oil Company of Indiana and its subsidiaries of violating this act by engaging in price discrimination that stifled competition within the petroleum industry across several states. The court ruled against Standard Oil, finding them guilty of using unfair pricing strategies to create a monopoly and suppress competitors from entering or surviving in the market space, thereby infringing upon free trade principles enshrined within federal law.

The dissenting opinion in the Standard Oil Company (Indiana) et al. v. United States case argued that the majority's decision to uphold an injunction against a price-fixing agreement between oil companies was incorrect and overreached its authority under the Sherman Act. The dissenters believed that there was no evidence of intent or actuality of monopolization, which is required for violation of Section 2 of the Sherman Act. They also contended that such agreements could be beneficial to competition by preventing ruinous price wars and ensuring stability in volatile markets, thus serving public interest rather than harming it as suggested by majority opinion. Furthermore, they disagreed with applying per se illegality rule without considering market realities and potential pro-competitive effects of such arrangements.