"It is...in his analysis of the circumstances which determined the evolution of the chief legal institutions, in which he shows why a complex civilisation could grow up only where certain types of legal institutions developed, that he makes some of his most important contributions to jurisprudence. In the discussion of these problems his economic and his legal and political theory are intimately connected. Hume is indeed one of the few social theorists who are clearly aware of the connection between the rules men obey and the order which is formed as a result... What he undertakes is to show that certain characteristics of modern society which we prize are dependent on conditions which were not created in order to bring about these results, yet are nevertheless their indispensable presuppositions. They are institutions "advantageous to the public though...not intended for that purpose by the inventors". Hume shows, in effect, that an orderly society can develop only if men learn to obey certain rules of conduct."