Liberty for Jefferson was 'the' driving force of human history and a realizable state of the human organism and of a society of men. Study of history and anthropology showed that humans were moving from the barbaric independence suffered in primal hordes, which lived inefficiently on lands, to a more economical, human-friendly use of land in social settings, demanding laws for order. Those laws, historically, favored the powerful few to the detriment of the hoi polloi. As a pupil of the Enlightenment, Jefferson argued that all humans were by nature equal, and thus, deserving of as much civic liberty as a reason-oriented and sciences-loving society, a Jeffersonian republic, could guarantee them. This book, philosophical, explains how such a society was possible, given Jefferson's conception of the nature of man, and how the realization of one such society could lead, through contagion, to a global community of such societies. There are a large number of books that cover Jefferson's political ideology (e.g., Gordon Wood's 'Empire of Liberty' and Adrienne Koch's 'The Philosophy of Thomas Jefferson')-too many to limn-but none that gets at the philosophical implications of TJ's views on liberty. This book, examining TJ as a natural scientist and philosophy, examines and situates him in the manner of other great political ideologists of his day-e.g., Hume and Kant.