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This Day in American History

May 15

1 historic event on this date

Court Case1911

Supreme Court Orders Dissolution of Standard Oil

The Supreme Court ordered the dissolution of Standard Oil Company under the Sherman Antitrust Act, finding that its monopolistic practices restrained trade. The decision established the "rule of reason" test for evaluating antitrust cases.

Why It Matters

This landmark antitrust ruling affirmed that the federal government could regulate corporate power to protect economic competition and consumer welfare, shaping the relationship between government and business.

Explore the Principles Behind the History

Every event in American history connects to the founding principles. Discover the ideas that shaped these moments.

View the 28 Founding Principles