This concept of the separation of power is the key to the success of Rome, which Polybius describes as having dominion over almost the entire world. The Consuls, the Senate, and the Popular Assemblies. Each embodied one of the three orders of government.
For Polybius, the function of politics is not to create unanimity, but rather to preserve liberty through stability. In another radical move for his time, Polybius rejected the solution of a mixed constitution.
Polybius never uses the word “mixed.” Instead, he uses the words “composition,” “arrangement,” “balance” and “equilibrium.” Polybius’s ideal political order is not mixed rather each part has a role to play.
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