Back at Mount Vernon, Washington resumed an aristocratic domestic style while modernizing the estate. He expanded and refitted the mansion (the two‑story New Room, a grand riverside piazza, cupola), installed formal gardens and a greenhouse, and kept to British taste. Financial strain pushed tighter oversight of five farms and a 1784 western trip to press tenants and confront squatters. He promoted Potomac navigation, backed James Rumsey’s boat, and concluded the West must be tied to the seaboard by trade. He pursued scientific agriculture—crop rotation, new barns, an automated mill—and bred mules from prized Spanish and Maltese jacks.

Washington’s postwar years exposed a deep conflict between revolutionary ideals and his economy based on the enslavement of Black Americans. Lafayette pressed him to pilot emancipation; Washington praised the aim but deferred concrete action, citing finances and advocating gradual, legislative abolition. He welcomed Lafayette (1784), later commended his Cayenne emancipation experiment, and privately denounced enslavement while declining to sign abolition petitions. Episodes—from the Quaker-assisted flight of an enslaved person to Washington’s letters urging only legal remedies—highlighted his caution. Economically overstocked with enslaved labor, he sometimes enslaved more people to settle debts, yet respected some marriages between enslaved persons and favored trusted individuals like Billy Lee, even as harsh labor persisted.

In 1783 Washington eagerly accepted the presidency of the Society of the Cincinnati, but public fury over its hereditary clause soon cast him as defender of an alleged military aristocracy. Alarmed, he convened the 1784 Philadelphia meeting, forcefully urging removal of the hereditary feature and foreign donations—only partially succeeding and vowing to withdraw. Far happier was his Masonic involvement, which drew no suspicion.

Simultaneously he championed Potomac-James River improvements, secured state charters, and refused stock grants, redirecting them toward education. Personal nostalgia surfaced in 1785 when he lamented fire-ravaged Belvoir and mourned friends’ deaths, underscoring the era’s blend of nation-building and private loss.

Washington devoted significant time to managing his image while professing discomfort with portraiture. Joseph Wright painted a bluntly realistic likeness and took a life mask; Robert Edge Pine painted multiple family portraits; and Jean-Antoine Houdon visited Mount Vernon to model Washington from life, producing the definitive statue for Virginia’s capitol, per Washington’s preference for modern dress over classical costume.

Simultaneously, Washington lamented the Articles of Confederation’s weakness—trade chaos, foreign threats, and no executive power. He corresponded with Madison and others about reform and viewed Shays’s Rebellion as proof of impending crisis, nudging him from retirement toward national leadership.

In late 1786–1787, Washington wrestled with whether to attend the Philadelphia convention, citing health, plantation pressures, and a conflict with the Society of the Cincinnati. Urged by Madison, Knox, and Jay—and alarmed by national drift and the convention’s now-Congress-sanctioned mandate—he agreed, aware it might pull him permanently from retirement. He briefly managed family matters, then entered Philadelphia to public acclaim and was unanimously chosen convention president. Washington maintained a restrained, nonpartisan role, enforced strict secrecy, and lent authority and credibility to the proceedings, even as social obligations and constant attention surrounded him.

In Philadelphia, Washington presided silently as delegates battled over representation, executive power, and enslavement. After bitter impasses, the “Great Compromise” paired equal representation in the Senate with proportional representation in the House. Southern delegates secured the three-fifths formula, a 20-year protection of the trade in enslaved persons, and a fugitive clause for enslaved people. Washington made a few targeted interventions (e.g., favoring one representative per 30,000) and enforced secrecy, while Gouverneur Morris shaped the final text and preamble. Of the 42 present, 39 signed on September 17, 1787. Franklin hailed a “rising sun,” and Washington returned to Mount Vernon exhausted but committed to ratification.

After Philadelphia, Washington quietly championed ratification, lending decisive prestige while remaining publicly circumspect. He tracked debates, circulated The Federalist Papers, and corresponded with allies as key states—especially Virginia and New York—narrowly approved the Constitution. With nine states ratified, momentum carried the rest.

Pressure mounted for Washington to be the first president; he professed reluctance, worried about appearing ambitious, and faced severe personal financial strain (even borrowing funds before departing for his inauguration). Despite seeking to refuse a salary, he ultimately accepted. In February 1789, the Electoral College unanimously chose Washington; Adams became vice president.