Thomas Jefferson (April 13 [O.S. April 2], 1743 – July 4, 1826) was an American Founding Father and the third president of the United States from 1801 to 1809. He was the primary author of the Declaration of Independence. Jefferson was the nation's first U.S. secretary of state under George Washington and then the nation's second vice president under John Adams. Jefferson was a leading proponent of democracy, republicanism, and natural rights, and he produced formative documents and decisions at the state, national, and international levels.

Jefferson was born into the Colony of Virginia's planter class, dependent on slave labor. During the American Revolution, Jefferson represented Virginia in the Second Continental Congress, which unanimously adopted the Declaration of Independence. Jefferson's advocacy for individual rights, including freedom of thought, speech, and religion, helped shape the ideological foundations of the revolution and inspired the Thirteen Colonies in their revolutionary fight for independence, which culminated in the establishment of the United States as a free and sovereign nation.

Jefferson served as the second governor of revolutionary Virginia from 1779 to 1781. In 1785, Congress appointed Jefferson U.S. minister to France, where he served from 1785 to 1789. President Washington then appointed Jefferson the nation's first secretary of state, where he served from 1790 to 1793.