Montesquieu's The Spirit of Laws is one of a handful of classic works of political philosophy deserving a fresh reading every generation. The product of immense erudition, Montesquieu's treatise has captured since its first printing (1748) the imagination of an impressive array of intellectuals including Rousseau, Voltaire, Beccaria, Madison, Hamilton, Jefferson, Herder, Sieyès, Condorcet, Robespierre, Bentham, Burke, Constant, Hegel, Tocqueville, Emile Durkheim, Raymond Aron, and...