Abstract
This paper will present an analysis of the concept of mixed government in political philosophy, accentuating its role as the central connecting thread both between theories within classical and early modern republicanism and of the two eras within the republican tradition. The first part of the paper will offer a definition of mixed government, contrasting it with separation of powers and explaining its potential significance in contemporary political though. The second part will offer a comprehensive, broad analysis of the concept, based on political theories of four thinkers of paramount influence: Aristotle, Cicero, Machiavelli and Guicciardini. In the final part, the theories and eras of republican tradition will be compared based on the previous analysis, establishing their essential similarities and differences.