What population groups were involved in the government of Rome?

During the Roman Republic 7th – 1st century BC. power could only be obtained by citizens of Rome. The main power of the Roman Republic at that time was with the Senate, which was divided into two groups: the Patricians and the Plebeians. Patricians were considered the heirs of Romulus, and all other citizens of Rome were plebeians. In this connection, we can say that the Patricians were a kind of elite. They most often represented the interests of the wealthy citizens of Rome. The plebeians, in turn, defended the common people and fought for their rights.