Looking, therefore, to the course followed by the Romans in this particular, and to that adopted by our modern rulers, it seems proper to consider whether or not it is advisable to build fortresses, and whether they are more likely to help or to hurt him who builds them In the first place, then, we are to remember that fortresses are built either as a defence against foreign foes or against subjects In the former case, I pronounce them unnecessary, in the latter mischievous. And to state the reasons why in the latter case they are mischievous, I say that when princes or republics are afraid of their subjects and in fear lest they rebel, this must proceed from knowing that their subjects hate them, which hatred in its turn results from their own ill conduct, and that again from their thinking themselves able to rule their subjects by mere force, or from their governing with little prudence. Now one of the causes which lead them to suppose that they can rule by mere force, is this very circumstance of their people having these fortresses on their backs So that the conduct which breeds hatred is itself mainly occasioned by these princes or republics being possessed of fortresses, which, if this be true, are really far more hurtful than useful First, because, as has been said already, they render a ruler bolder and more violent in his bearing towards his subjects, and, next, because they do not in reality afford him that security which he believes them to give For all those methods of violence and coercion which may be used to keep a people under, resolve themselves into two; since either like the Romans you must always have it in your power to bring a strong army into the field, or else you must dissipate, destroy, and disunite the subject people, and so divide and scatter them that they can never again combine to injure you For should you merely strip them of their wealth, _spoliatis arma supersunt_, arms still remain to them, or if you deprive them of their weapons, _furor arma ministrat_, rage will supply them, if you put their chiefs to death and continue to maltreat the rest, heads will renew themselves like those Hydra; while, if you build fortresses, these may serve in time of peace to make you bolder in outraging your subjects, but in time of war they will prove wholly useless, since they will be attacked at once by foes both foreign and domestic, whom together it will be impossible for you to resist. And if ever fortresses were useless they are so at the present day, by reason of the invention of artillery, against the fury of which, as I have shown already, a petty fortress which affords no room for retreat behind fresh works, cannot be defended.