This essay offers an alternative to influential interpretations of elites, peoples, and senates in Niccolò Machiavelli's theory of mixed republics. It analyzes in greater depth both Machiavelli's ascription of the morally objectionable and politically dangerous trait of insolenzia to the nobles as a social class; and his justifications for the establishment of senates as institutions that partially remedy the problem of aristocratic insolence—justifications that depart from traditional Ciceronian and Polybian standards. Machiavelli demonstrates in The Prince, the Discourses, and the Florentine Histories that republics with senates, such as ancient Rome, manage to mollify aristocratic insolence, while those lacking them, like modern Florence, permit such insolence to proliferate unchecked. Moreover, Machiavelli intimates, republics that collectively gather nobles within senate chambers are afforded the opportunity to entirely eliminate aristocratic insolence. The essay concludes with an analysis of senatorial institutions in Machiavelli's “Discursus on Florentine Matters.”