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. Notably, he was the principal author of the Declaration of Independence and made significant contributions to the literature on American governance and philosophy. Jefferson's 'Notes on the State of Virginia', written in 1781-1785 and published in 1785, stands as the most comprehensive and insightful depiction of the Virginian landscape, society, politics, and economy of its time. Within its pages, Jefferson outlined his ideas on a variety of subjects, from law and politics to natural history and architecture. Jefferson's 'Notes' is characterized by its meticulous detail and the author's fervent belief in the Enlightenment ideals of knowledge and reason. It is one of the most important works of American Enlightenment literature, often meditating on the fundamental principles that would shape the newly independent nation. His literary style combined enlightenment thinking with empirical observation, allowing Jefferson to scrutinize the contradictions between the nation's barbaric practice of slavery and the ideals of freedom that he himself helped to articulate. Uniquely, Jefferson's works continue to be studied for their historical, political, and ethical implications, laying the groundwork for the United States' expansion westward and providing a critical foundation for the study of American history and political science.