(1743–1826), American revolutionary leader and political philosopher, author of the Declaration of Independence, and third president of the U.S. (1801–9).

Jefferson was among the most brilliant American exponents of the Enlightenment, the movement of 18th-century thought that emphasized the possibilities of human reason. A Virginia aristocrat, he had the time and resources to educate himself in history, literature, law, architecture, science, and philosophy; as a diplomat and friend of French and British intellectuals, he had direct access to European culture and thought; and as a provincial farmer and novice revolutionary leader, he had the motivation and the opportunity to apply Enlightenment political philosophy to the task of nation-building.

Early Life.

Jefferson was born on April 13, 1743, at Shadwell in Albemarle Co., Va. His father was a plantation owner, and his mother belonged to the Randolph family, which was prominent in colonial Virginia. From his father and from his environment he acquired an intense interest in botany, geology, cartography, and North American exploration, and from a childhood teacher a love of Greek and Latin. As a student at the College of William and Mary in the early 1760s, he studied under William Small (1734–75), who knew in depth the Scottish Enlightenment, with its highly integrated approach to law, history, philosophy, and science. In George Wythe, he found an equally gifted teacher of the law. Jefferson was admitted to the bar in 1767 and first elected to the Virginia House of Burgesses in 1769. His principal passion during his late 20s was the design and building of his home, Monticello. Despite several desultory courtships, he did not seriously consider marriage until 1770, when he met Martha Wayles Skelton (1747–82), a wealthy widow of 23. They were married in 1772.

Theoretician of Independence.

During his 20s, Jefferson read voraciously in Enlightenment philosophy, 17th-century English history, political theory, and law. Drawing on this learning, he drafted in 1774 a Summary View of the Rights of British America as instructions for Virginia's delegates to the First Continental Congress, which met to consider the colonies' grievances against Great Britain. Virginia leaders instead adopted a more legalistic set of instructions, and Summary View was published anonymously as a pamphlet. As Jefferson's authorship became widely known, however, he moved suddenly into the front rank of American political theorists.

In the pamphlet, Jefferson argued that the original settlers of the colonies came as individuals rather than as agents of the British government. The colonial governments they formed therefore embodied the natural right of expatriates from one country to select the terms of their subjection to a new ruler. Colonial legislatures and the British Parliament, he asserted, shared power, and both were responsible for protecting the “liberties and rights” of the people.

The Declaration of Independence, drafted principally by Jefferson in late June 1776 for the Second Continental Congress, drew the implications of this historical view to their logical conclusion, proclaiming that the tyrannical acts of the British government gave the colonists the right to “dissolve the political bands” that had connected them with the mother country.

Legislative Achievements.

As a legislator in Virginia (1776–79), Jefferson sought to reform society along enlightened and republican lines. After successfully proposing the disestablishment of the Anglican church, he was responsible for legislation abolishing entail (inheritance of land through a particular line of descent) and primogeniture (inheritance only by the eldest son), thus eliminating two major governmental restrictions on the use of private property.

The reform of the Virginia criminal code—in which Jefferson was a leading participant—did not achieve the humanitarian results to which he was dedicated but did eliminate the most barbarous and repressive practices, such as public whippings, dunkings, and bills of attainder (which condemned accused persons without trial). The legislature refused outright to adopt Jefferson's bill for a public school system and library, but many years later, he succeeded in establishing the University of Virginia (which opened in 1825)—one of the three accomplishments that he memorialized in the epitaph on his tombstone. The other two were his authorship of the Declaration of Independence and of the Statute of Virginia for Religious Freedom—the latter the most important of his achievements as a Virginia legislator. The religious freedom statute, originally introduced in 1779 but not actually passed by the legislature until 1786, prohibited any state financing of religious instruction. Almost entirely composed of an eloquent preface, it brilliantly excoriated the baneful effects of state sponsorship of worship and belief.

As governor of Virginia from 1779 to 1781, Jefferson failed to prevent the British from invading the state. After leaving office he retreated to Monticello to write his classic Notes on the State of Virginia. The Notes, which were written for the information of a French correspondent, deal with social, political, and economic life in the 18th century.

After his wife's death in 1782, Jefferson again became a delegate to the Congress, and in 1784 he drafted the report that was the basis for the Ordinances of 1784, 1785, and 1787. As minister to France, from 1784 to 1789, he steeped himself in French learning and witnessed, with excitement and approval, the early stages of the French Revolution.

The Washington and Adams Administrations.

As secretary of state in George Washington's first administration (1789–93), Jefferson revived a proposal he had originated as a member of Congress in 1783 to establish reciprocal trade agreements with continental European nations and, in the face of British restrictions on American commerce, to deny such benefits to the British. The proposal died in Congress. His hopes for at least an even-handed American approach to Britain and France evaporated when the French envoy, Edmond Genêt, appealed to the public for a military alliance with revolutionary France—an indiscretion that made Washington decide to remain neutral in the war between Britain and France.

After leaving office, Jefferson was disturbed by the administration's increasing friendliness to Great Britain and by other policies promoted by Treasury Secretary Alexander Hamilton. In 1796, he reluctantly allowed his name to be put forward as a candidate for the presidency by the opposition Republican party. He received the second largest number of votes among four candidates and therefore, according to the electoral system then in use, became vice-president under the Federalist president John Adams in 1797.

During his term in that office he watched with growing indignation as the Federalists capitalized on anti-French feeling to create a standing army under the control of his enemy, Alexander Hamilton, and to pass the Alien Acts, restricting the liberty of supposedly pro-Republican foreigners, and the Sedition Act, which allowed the prosecution of anyone who printed false statements critical of government officials. In resolutions drafted for the Kentucky and Virginia legislatures, Jefferson and James Madison denounced the constitutionality of these laws and assigned to the states the role of bulwark against infringements on individual liberties.

Jefferson as President.

In the election of 1800, Jefferson and his fellow Republican Aaron Burr received an equal number of electoral votes, thus creating a tie and throwing the presidential election into the House of Representatives. After 36 ballots, the House declared Jefferson elected. (The Constitution was then amended to require a separate electoral vote for president and vice-president.)

As had Adams before him, Jefferson faced opposition from an uncompromising faction within his own party as well as from the Federalists. He steered a steady course between these two extremes, appointing some qualified Federalists to office and refusing a wholesale purge of officeholders inherited from the Adams administration. He supported repeal of the Judiciary Act of 1801, which had created a costly tier of federal appeals courts and would have encouraged appeals from state courts, but he opposed any assault on the independence of the Federalist-dominated judiciary; Jefferson's three appointments to the Supreme Court, made between 1804 and 1807, were all strong nationalists and upholders of judicial independence.

During Jefferson's first term his lifelong interest in the American West and in American-French relations prompted his major presidential achievement, the purchase from France of Louisiana—all the western land drained by the Missouri and Mississippi rivers—and the organization of an expedition by the American explorers William Clark and Meriwether Lewis to explore this territory (see Louisiana Purchase). Foreign policy during his second term was less successful. Seeking to force the British to respect U.S. neutrality on the high seas during the Napoleonic Wars, he persuaded Congress in 1807 to embargo all trade with Britain—a move that failed to elicit any concessions, devastated the nation's economy for a generation, and alienated New England, which lived by foreign trade.

Jefferson and Slavery.

After leaving office in 1809 Jefferson retired to Monticello, where he lived until his death on July 4, 1826, corresponding with Adams about the great issues of revolution and constitutionalism, trying to preserve his declining estate for his daughters instead of his creditors, and brooding over the baneful effects of slavery. He was unwilling, for financial reasons, to free his own slaves, and he disagreed with abolitionist friends who held that blacks were equal to whites. Jefferson's paradoxical beliefs in human dignity and in racial inferiority typified the dilemma of the country he had helped to create.

More than 20 years before his death, reports had begun circulating of a long-term relationship between Jefferson and Sally Hemings (1773–1835), one of his slaves; at least two of her children claimed that they believed the former president was their father. For nearly two centuries, the issue remained a matter of intense debate, with Jefferson's family and many historians casting doubt on the Hemings's claims. In January 2000, however, following analysis of DNA taken from descendants of Jefferson and Hemings, the Thomas Jefferson Memorial Foundation, which administers Monticello, acknowledged that in all likelihood Jefferson was the father of at least one and perhaps all of her six known children.        R.M.C., ROBERT M. CALHOON, M.A., Ph.D.

See also Continental Congress; Enlightenment, Age of; Kentucky and Virginia Resolutions; Political Parties in the United States.

For further information on this person, see the section Jefferson, Thomas.