(1743-1826). Author of the Declaration of Independence, third President of the United States, major architect of the U.S.'s westward expansion and founder of the University of Virginia, Thomas Jefferson is a figure of world historical significance. His writings are important documents for the history of America's founding and for the Founders' attempts to put into practice theories associated with the eighteenth century Enlightenment. Jefferson's concepts of democracy remain inspirational for many people today, even as his views on religion and race remain a source of controversy.