Rousseau, on the other hand, bases no vital argument on the historical nature of the contract, in which, indeed, he clearly does not believe. “How,” he asks, “did this change [from nature to society] come about?” And he answers that he does not know. Moreover, his aim is to find “a sure and legitimate rule of administration, taking men as they are and laws as they might be”; that is to say, his Social Contract is something which will be found at work in every legitimate society, but which will be in abeyance in all forms of despotism. He clearly means by it no more and no less than the fundamental principle of political association, the basis of the unity which enables us, in the State, to realise political liberty by giving up lawlessness and license. The presentation of this doctrine in the quasi-historical form of the Social Contract theory is due to the accident of the time and place in which Rousseau wrote. At the same time, the importance of the conception is best to be seen in the hard death it dies. Though no one, for a hundred years or so, has thought of regarding it as historical, it has been found so hard to secure any other phrase explaining as well or better the basis of political union that, to this day, the phraseology of the contract theory largely persists.