It is in the third book of the _Social Contract_, where Rousseau is discussing the problem of government, that it is most essential to remember that his discussion has in view mainly the city-state and not the nation. Broadly put, his principle of government is that democracy is possible only in small States, aristocracy in those of medium extent, and monarchy in great States (Book III, chap. iii). In considering this view, we have to take into account two things. First, he rejects representative government; will being, in his theory, inalienable, representative Sovereignty is impossible. But, as he regards all general acts as functions of Sovereignty, this means that no general act can be within the competence of a representative assembly. In judging this theory, we must take into account all the circumstances of Rousseau's time. France, Geneva and England were the three States he took most into account. In France, representative government was practically non-existent; in Geneva, it was only partially necessary; in England, it was a mockery, used to support a corrupt oligarchy against a debased monarchy. Rousseau may well be pardoned for not taking the ordinary modern view of it. Nor indeed is it, even in the modern world, so satisfactory an instrument of the popular will that we can afford wholly to discard his criticism. It is one of the problems of the day to find some means of securing effective popular control over a weakened Parliament and a despotic Cabinet. The second factor is the immense development of local government. It seemed to Rousseau that, in the nation-state, all authority must necessarily pass, as it had in France, to the central power. Devolution was hardly dreamed of; and Rousseau saw the only means of securing effective popular government in a federal system, starting from the small unit as Sovereign. The nineteenth century has proved the falsehood of much of his theory of government; but there are still many wise comments and fruitful suggestions to be found in the third book of the _Social Contract_ and in the treatise on the _Government of Poland_, as well as in his adaptation and criticism of the _Polysynodie_ of the Abbé de Saint-Pierre, a scheme of local government for France, born out of its due time.