Thomas Jefferson, 1743 – 1826, was an American Founding Father, the principal author of the Declaration of Independence (1776) and the third President of the United States (1801–1809). He was a spokesman for democracy and the rights of man with worldwide influence. At the beginning of the American Revolution, he served in the Continental Congress, representing Virginia and then served as a wartime Governor of Virginia (1779–1781). Just after the war ended, from mid-1784 Jefferson served as a diplomat, stationed in Paris.
In May 1785, he became the United States Minister to France.
Jefferson was the first United States Secretary of State (1790–1793) serving under President George Washington. Elected president in what Jefferson called the Revolution of 1800, he oversaw the purchase of the vast Louisiana Territory from France (1803), and sent the Lewis and Clark Expedition (1804–1806) to explore the new west.