The focus of Thomas Jefferson's key writings and beliefs revolved around the principles of liberty, democracy, and individual rights. As the principal author of the Declaration of Independence, he articulated the ideals of freedom and the notion that governments derive their power from the consent of the governed. Jefferson was also a proponent of religious freedom and separation of church and state. His vision for an agrarian society highly valued education and the enlightenment of citizens, shaping the foundation of American political philosophy.