The two social classes of ancient rome were made up of patricians and

Patrician & Plebeians

The patricians were the ruling class of the early Roman Empire. Only certain families were part of the patrician class and you had to be born a patrician. The patricians were only a small percentage of the Roman population, but they held all the power. All the other citizens of Rome were Plebeians.

plebeians is the correct answer.

Explanation:

an era of negotiation.

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the commander in chief