In the case United States v. Aluminum Co. of America et al., 1963, the U.S government accused the Aluminum Company of America (Alcoa) and several other aluminum manufacturers of violating antitrust laws by conspiring to monopolize and control the production and distribution of primary aluminum products in violation of Section 1 and 2 Sherman Act. The Supreme Court ruled that Alcoa had indeed engaged in practices that were anti-competitive, including price-fixing agreements with competitors, dividing markets among themselves, restricting output to maintain high prices, acquiring competing firms or potential entrants into their market space thereby reducing competition significantly. As a result, Alcoa was ordered to divest some assets as part its punishment for engaging in these illegal activities.

The dissenting opinion in the United States v. Aluminum Co. of America case argued that the majority's decision to apply U.S. antitrust laws to a foreign corporation was an overreach of jurisdiction and could potentially lead to international conflict. The justice contended that Congress did not intend for these laws, specifically the Sherman Act, to be applied extraterritorially when it was enacted in 1890 because such application would interfere with other nations' sovereignty rights and their ability to regulate commerce within their own borders. Furthermore, they believed this interpretation could set a dangerous precedent where other countries might reciprocate by applying their domestic laws onto American companies operating abroad which would create legal uncertainty for multinational corporations.