Thomas Jefferson (April 13, 1743 – July 4, 1826) was an American statesman, diplomat, lawyer, architect, philosopher, and Founding Father who served as the third president of the United States from 1801 to 1809. He previously served as the second vice president of the United States from 1797 to 1801. He previously served as the second vice president of the United States from 1797 to 1801. The principal author of the Declaration of Independence, Jefferson was a proponent of democracy, republicanism, and individual rights, motivating American colonists to break from the Kingdom of Great Britain and form a new nation; he produced formative documents and decisions at both the state and national level. A few months after the birth of her last child, she died on September 6, 1782, at the age of 33 with Jefferson at her bedside. Shortly before her death, Martha made Jefferson promise never to marry again, telling him that she could not bear to have another mother raise her children.