Remarks on Machiavelli’s democratic republicanism and Rousseau’s aristocratic republicanism

McCormick opposes Machiavelli’s democratic republicanism and Rousseau’s aristocratic republicanism by showing that Machiavelli and Rousseau have a very different view of the republican institutions of Rome. Why does Rousseau’s “tale of Rome” differ form Machiavelli’s “tale of Rome”? Why does Rousseau repudiate Machiavelli’s more democratic reconstruction of the Roman Republic? And more generally, why does Rousseau devote so many pages to the republican institutions of Rome? He is looking at Rome to describe a kind of democracy or a kind of aristocracy?