Among moderns, Rousseau declared that he was not a democrat, and he was right, because by democracy he meant the Athenian system of direct government, of which he did not for an instant approve. In the "Social Contract" he has drawn up a most detailed scheme, which, in spite of some contradictions and obscure passages, is an exact description of democracy as we understand the word; but still we cannot tell if he is actually a democrat, because we do not know what he means by "citizens," whether he means everybody or only one class, though that a numerous one. Rousseau has written more fully than anyone else, not so much of the influence of democracy on morals, as of the _coincidence_ between democracy and good morals. Equality, frugality and simplicity can all be found, according to Rousseau, in States where there is neither royalty nor aristocracy nor plutocracy. As I understand it, his meaning is that the same virtue which makes certain nations love equality, frugality and simplicity is also productive of a form of government which excludes aristocracy, plutocracy and royalty. If you have simplicity, frugality and equality, you will probably live in a republic that is democratic or virtually democratic. This is, I think, the clearest and most impartial summary that we can make of Rousseau's doctrine, which, though set forth in rigid formulæ, is still extremely vague.
In this he is a far more faithful follower of Montesquieu than he will allow. All that I have quoted is to be found literally in Montesquieu's chapters on democracy. Even his famous saying, "the ruling principle of democracy is virtue," means, when he uses it in one sense, no more than that it is the synthesis of these three perfections, equality, simplicity and frugality. For Montesquieu sometimes uses "virtue" in a narrow, and sometimes in a broad sense, sometimes in the sense of political and civic virtue or patriotism, sometimes in the sense of virtue properly speaking (simplicity, frugality, thrift, equality). In this latter case he and Rousseau are absolutely agreed.
Montesquieu only considers democracy in decadence, as his custom is in respect of other forms of government, and though he does not actually cite Plato, he really gives the substance of what we have already quoted. "When the people wishes to do the work of the magistrates, the dignity of the office disappears and when the deliberations of the Senate carry no weight, neither senators nor old men are treated with respect. When old men do not receive respect, fathers cannot expect it from their children, husbands from their wives, nor masters from their men. At length everyone will learn to rejoice in this untrammelled liberty, and will grow as weary of commanding as of obeying. Women, children and slaves will submit to no authority. There will be an end of morals, no more love of order, no more virtue."