Liberty. Justice. Nature. Law. First formulated millennia ago by the founding philosophers of the Western tradition, these basic concepts of human thought remain central to our conception of ourselves, our place in the world, and our relationships with others-that is, our politics. Readers encountering such broad political concepts, their practical expressions in political movements and systems of government, the ideas of influential ancient and modern political thinkers--or simply familiar or unfamiliar catchphrases for which they would like a succinct yet informative explanation--will...