Few works of literature are held in greater estimation, than those which treat in a methodical and elementary way of the principles of science. But the human mind in every enlightened age is progressive; and the best elementary treatises after a certain time are reduced in their value by the operation of subsequent discoveries. Hence it has always been desired by candid enquirers, that preceding works of this kind should from time to time be superseded, and that other productions including the larger views that have since offered themselves, should be substituted in their place.
It would be strange if something of this kind were not desirable in politics, after the great change that has been produced in men's minds upon this subject, and the light that has been thrown upon it by the recent discussions of America and France. A sense of the value of such a work, if properly executed, was the motive which gave birth to these volumes. Of their execution the reader must judge.
Authors who have formed the design of superseding the works of their predecessors, will be found, if they were in any degree equal to the design, not merely to have collected the scattered information that had been produced upon the subject, but to have increased the science with the fruit of their own meditations. In the following work principles will occasionally be found, which it will not be just to reject without examination, merely because they are new. It was impossible perseveringly to reflect upon so prolific a science, and a science which may be said to be yet in its infancy, without being led into ways of thinking that were in some degree uncommon.
Another argument in favour of the utility of such a work was frequently in the author's mind, and therefore ought to be mentioned. He conceived politics to be the proper vehicle of a liberal morality. That description of ethics deserves to be held in slight estimation, which seeks