Physiocratic economic views have hitherto gained much more attention than the political theories of this advanced set of economic thinkers in eighteenth century France. Mario Einaudi here discusses one element in their political thought, the doctrine of judicial review, an indispensable safeguard of the rights of individuals in a state. The fundamental importance of this doctrine at the center of our own constitutional system and the controversies concerning it, emphasize the need of a study which treats of these significant principles wherever they are found.