Machiavelli

Those serious, though natural enmities, which occur between the popular classes and the nobility, arising from the desire of the latter to command, and the disinclination of the former to obey, are the causes of most of the troubles which take place in cities; and from this diversity of purpose, all the other evils which disturb republics derive their origin. This kept Rome disunited; and this, if it be allowable to compare small things with great, held Florence in disunion; although in each city it produced a different result; for animosities were only beginning with the people and nobility of Rome contended, while ours were brought to a conclusion by the contentions of our citizens. A new law settled the disputes of Rome; those of Florence were only terminated by the death and banishment of many of her best people.

I then only remained to assign its place to the popular element, and the Roman nobles growing insolent from causes which shall be noticed hereafter, the commons against them, when, not to lose the whole of their power, they were forced to concede a share to the people; while with the share which remained, the senate and consults retained so much authority that they still held their own place in the republic. In this way the tribunes of the people came to be created, after whose creation the stability of the State was much augmented, since each the three forms of government had now is due influence allowed it. And such was the good fortune of Rome that although her government passed from the kings to the nobles, and from these to the people, by the steps and for the reasons noticed above, still the entire authority of the kingly element was not sacrificed to strengthen the authority of the nobles, nor were the nobles divested of their authority to bestow it on the commons; but three, blending together, made up a perfect State; which perfection, as shall be fully shown in the next two Chapters, was reached through the dissensions of the commons and the senate.

Nor do I want it to be thought presumption if a man from a low and mean state dares to discuss and give rules for the governments of princes. For just as those who sketch landscapes place themselves down int he plain to consider the nature of mountains and high places and to consider the nature of low places place themselves high atop mountains, similarly, to know well the nature of peoples one needs to be prince, and to know well the nature of princes one needs to be of the people.