United States Leading Case erie doctrinediversity jurisdictionfederal statefederalism

Erie Railroad Co v Tompkins

304 U.S. 64 (1938)

JurisdictionUnited States

CourtSupreme Court of the United States

Year1938

StatusBinding authority

Key Principle

federal courts in diversity apply state substantive law

Choice of Law and Federalism

Klein v. Martin 607 U. S. 213 (2026)

Glossip v Oklahoma 604 U.S. 226 (2025)

Cunningham v. Cornell 604 U.S. 693 (2025)

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