These as they have had different origins, so likewise have had different laws and institutions. For to some at their very first commencement, or not long after, laws have been given by a single legislator, and all at one time; like those given by Lycurgus to the Spartans; while to others they have been given at different times, as need rose or accident determined; as in the case of Rome. That republic, indeed, may be called happy, whose lot has been to have a founder so prudent as to provide for it laws under which it can continue to live securely, without need to amend them; as we find Sparta preserving hers for eight hundred years, without deterioration and without any dangerous disturbance. On the other hand, some measure of unhappiness attaches to the State which, not having yielded itself once for all into the hands of a single wise legislator, is obliged to recast its institutions for itself; and of such States, by far the most unhappy is that which is furthest removed from a sound system of government, by which I mean that its institutions lie wholly outside the path which might lead it to a true and perfect end. For it is scarcely possible that a State in this position can ever, by any chance, set itself to rights, whereas another whose institutions are imperfect, if it have made a good beginning and such as admits of its amendment, may in the course of events arrive at perfection. It is certain, however, that such States can never be reformed without great risk; for, as a rule, men will accept no new law altering the institutions of their State, unless the necessity for such a change be demonstrated; and since this necessity cannot arise without danger, the State may easily be overthrown before the new order of things is established. In proof whereof we may instance the republic of Florence, which was reformed in the year 1502, in consequence of the affair of Arezzo, but was ruined in 1512, in consequence of the affair of Prato.