Joseph Story (1779-1845): American judge. Appointed Associate Justice of the Supreme Court in 1811. At a time when the Federal government was still very small, he generally stood for expansive federal powers. His opinions, and the reasoning behind them, were very important in establishing the nature of the American legal system. His decision in Martin v. Hunter's Lessee, for instance, was vital in determining the relationship between Federal and state jurisdictions. He also served as an educator, helping build a strong future tradition.