This may be seen in his treatment of law as a whole (Book II , chap. VI ), which deserves very careful attention. He defines laws as “acts of the general will,” and, agreeing with Montesquieu in making law the “condition of civil association,” goes beyond him only in tracing it more definitely to its origin in an act of will. The Social Contract renders law necessary, and at the same time makes it quite clear that laws can proceed only from the body of citizens who have constituted the State. “Doubtless,” says Rousseau, “there is a universal justice emanating from reason alone; but this justice, to be admitted among us, must be mutual. Humbly speaking, in default of natural sanctions, the laws of justice are ineffective among men.” Of the law which set up among men this reign of mutual justice the General Will is the source.
We thus come at last to the General Will, the most disputed, and certainly the most fundamental, of all Rousseau’s political concepts. No critic of the Social Contract has found it easy to say either what precisely its author meant by it, or what is its final value for political philosophy. The difficulty is increased because Rousseau himself sometimes halts in the sense which he assigns to it, and even seems to suggest by it two different ideas. Of its broad meaning, however, there can be no doubt. The effect of the Social Contract is the creation of a new individual. When it has taken place, “at once, in place of the individual personality of each contracting party, the act of association creates a moral and collective body, composed of as many members as the assembly contains voters, and receiving from the act its unity, its common identity ( moi commun ), its life and its will” (Book I , chap. VI ). The same doctrine