Book 3, Chapter 12: How the Sovereign Authority Maintains Itself explained simply

CHAPTER XII HOW THE SOVEREIGN AUTHORITY MAINTAINS ITSELF The Sovereign, having no force other than the legislative power, acts only by means of the laws; and the laws being solely the authentic acts of the general will, the Sovereign cannot act save when the people is assembled. The people in assembly, I shall be told, is a mere chimera. It is so to-day, but two thousand years ago it was not so. Has man's nature changed? The bounds of possibility, in moral matters, are less narrow than we imagine: it is our weaknesses, our vices and our prejudices that confine them. Base souls have no belief in great men; vile slaves smile in mockery at the name of liberty. Let us judge of what can be done by what has been done. I shall say nothing of the Republics of ancient Greece; but the Roman Republic was, to my mind, a great State, and the town of Rome a great town. The last census showed that there were in Rome four hundred thousand citizens capable of bearing arms, and the last computation of the population of the Empire showed over four million citizens, excluding subjects, foreigners, women, children and slaves. What difficulties might not be supposed to stand in the way of the frequent assemblage of the vast population of this capital and its neighbourhood. Yet few weeks passed without the Roman people being in assembly, and even being so several times. It exercised not only the rights of Sovereignty, but also a part of those of government. It dealt with certain matters, and judged certain cases, and this whole people was found in the public meeting-place hardly less often as magistrates than as citizens. If we went back to the earliest history of nations, we should find that most ancient governments, even those of monarchical form, such as the Macedonian and the Frankish, had similar councils. In any case, the one incontestable fact I have given is an answer to all difficulties; it is good logic to reason from the actual to the possible.