Moreover, Turgot expressly admits the ever-present wants of society to be the stimulating agents, as well as the guides, of scientific energy. He expressly admits, too, that they are constantly plucking men by the skirt, and forcing them back to social rules of conduct. It is certain, therefore, that as the necessities of society increase in number and complexity, morality will be developed to correspond with them, and the way in which new applications of ethical sentiments to the demands of the common weal are made, is as interesting and as deserving of a place in any scientific inquiry into social progress, as the new applications of physical truths to satisfy material needs and to further material convenience. Turgot justly points to the perfecting of language as one of the most important of the many processes that go to the general advancement of the race.[42] Not less, but more, important is the analogous work of perfecting our ideas of virtue and duty. Surely this chamber, too, in the great laboratory deserves that the historian should unseal its door and explore its recesses. [Footnote 42: P. 603.] The characteristic merits of the second of the two discourses at the Sorbonne may be briefly described in this way. It recognises the idea of ordered succession in connection with the facts of society. It considers this succession as one, not of superficial events, but of working forces. Thus Bolingbroke, writing fifteen years before, had said that 'as to events that stand recorded in history, we see them all, we see them as they followed one another, or as they produced one another, causes or effects, immediate or remote.'[43] But it is very evident from his illustrations that by all this he understood no more than the immediate connection between one transaction and another. He thought, for example, of the Revolution of 1688 being a consequence of the bad government of James the Second; of this bad government springing from the king's attachment to popery; this in turn being caused by the exile of the royal family; this exile having its source in Cromwell's usurpation; and so forth, one may suppose, down to the Noachian flood, or the era when the earth was formless and void. It is mere futility to talk of cause and effect in connection with a string of arbitrarily chosen incidents of this sort. Cause and effect, in Turgot's sense of history, describe a relation between certain sets or groups of circumstances, that are of a peculiarly decisive kind, because the surface of events conforms itself to their inner working. His account of these deciding circumstances was not what we should be likely to accept now, because he limited them too closely to purely intellectual acquisitions, as we have just seen, and because he failed to see the necessity of tracing the root of the whole growth to certain principles in the mental constitution of mankind. But, at all events, his conception of history rose above merely individual concerns, embraced