Washington presided over the Constitutional Convention in 1787, which devised a new form of federal government for the United States. Following unanimous election as President in 1789, he worked to unify rival factions in the fledgling nation. He supported Alexander Hamilton's programs to satisfy all debts, federal and state, established a permanent seat of government, implemented an effective tax system, and created a national bank.[9] In avoiding war with Great Britain, he guaranteed a decade of peace and profitable trade by securing the Jay Treaty in 1795, despite intense opposition from the Jeffersonians. Although he remained nonpartisan, never joining the Federalist Party, he largely supported its policies. Washington's Farewell Address was an influential primer on republican virtue, warning against partisanship, sectionalism, and involvement in foreign wars. He retired from the presidency in 1797, returning to his home and plantation at Mount Vernon.