Yes, the Roman Republic had a system of separation of powers, although it was different from modern interpretations and ultimately failed to prevent the concentration of power. Power was divided among different bodies like the consuls (executive), the Senate (aristocratic/advisory), and the popular assemblies (democratic/legislative). This structure incorporated checks and balances, such as annual term limits for magistrates, the election of two consuls who could veto each other, and various other magistrates with overlapping powers.
Components of the Roman Republic's power structure
Consuls: Two elected consuls served as the highest ordinary magistrates, holding executive power similar to a president or prime minister. Each consul could veto the other's actions, and they were limited to one-year terms.
Senate: A body of experienced and wealthy citizens that held significant advisory and legislative influence. Senators, often former magistrates, debated and approved legislation, though they could be filibustered by other senators.
Assemblies: Assemblies of citizens elected officials and passed laws, representing a democratic element of the government.
Other Magistrates: A variety of other offices, such as praetors, quaestors, and tribunes, existed with specific duties and powers. Tribunes, for example, had the power to veto the actions of other magistrates.
Dictator: In times of extreme emergency, a single dictator could be appointed with supreme power, but this was a temporary and extraordinary office with a set term limit.
Checks and balances
Term limits: Magistrates served short, annual terms.
Two consuls: The system required two consuls to serve together, and either could veto the other's actions.
Veto power: Many magistrates had the power to veto the actions of other magistrates of equal or lower rank.
Public scrutiny: Officials had to act publicly and could be tried for abuse of power after their term expired.
Approval of assemblies: The people, through assemblies, had to approve certain actions, such as legislation.