It is indeed, in Rousseau's own thought, only one of the three different ways in which the basis of political union is stated, according to the preoccupation of his mind. When he is thinking quasi-historically, he describes his doctrine as that of the Social Contract. Modern anthropology, in its attempts to explain the complex by means of the simple, often strays further from the straight paths of history and reason. In a semi-legal aspect, using the terminology, if not the standpoint, of jurisprudence, he restates the same doctrine in the form of popular Sovereignty. This use tends continually to pass over into the more philosophical form which comes third. "Sovereignty is the exercise of the general will." Philosophically, Rousseau's doctrine finds its expression in the view that the State is based not on any original convention, not on, any determinate power, but on the living and sustaining rational will of its members. We have now to examine first Sovereignty and then the General Will, which is ultimately Rousseau's guiding conception. Sovereignty is, first and foremost, a legal term, and it has often been held that its use in political philosophy merely leads to confusion. In jurisprudence, we are told, it has the perfectly plain meaning given to it in Austin's famous definition. The Sovereign is "a _determinate_ human superior, _not_ in a habit of obedience to a like superior, but receiving _habitual_ obedience from the _bulk_ of a given society." Where Sovereignty is placed is, on this view, a question purely of fact, and never of right. We have only to seek out the determinate human superior in a given society, and we shall have the Sovereign. In answer to this theory, it is not enough, though it is a valuable point, to show that such a determinate superior is rarely to be found. Where, for instance, is the Sovereign of England or of the British Empire? Is it the King, who is called the Sovereign? Or is it the Parliament, which is the legislature (for Austin's Sovereign is regarded as the source of law)? Or is it the electorate, or the whole mass of the population, with or without the right of voting? Clearly all these exercise a certain influence in the making of laws. Or finally, is it now the Cabinet? For Austin, one of these bodies would be ruled out as indeterminate (the mass of the population) and another as responsible (the Cabinet). But are we to regard the House of Commons or those who elect it as forming part of the Sovereign? The search for a determinate Sovereign may be a valuable legal conception; but it has evidently nothing to do with political theory.