The "senate" or "council of elders" was also born with credit to Romulus. Plebians were part of the senate and they could not prove they were gens or belonged to this group. Romulus also created his own people and established the Roman military. The following three kings were in power from 717 B.C. until 616 B.C. Their names were Numa Pompillius, Tullus Hostilus, and Ancus Martius. Numa, was the first king and was mostly known mostly for his expedition to move the people of Alba Longa to Rome. Ancus, dredged a harbor near Ostia, and he also built fortifications to protect commercial traffic along the Tiber River. .
Servius Tillius, known for succeeding his father in law for the spot of king in Rome, also created a census among the Roman people and based on his results, he organized the people of Rome into five different classes. The classes consisted of a variety of men ranging from them in full suited armor and good weapons, to the men only armed with slingshots. Servius" reforms eventually led to the development of a more effective timocracy. .
The Roman Republic developed something called the Concelium plebis. This was created because the Romans were unhappy with the constitution of the republic. The soldiers wanted their political rights, and if they weren't granted these rights, they threatened that there would be consequences. The consequences could either be having the workers go on strike, or form an independent city and therefore the laws would be up to them. These plebian assemblies became known as the Concelium Plebis. So now Rome had two separate governments for the plebians and the patricians.
Even after all of this ruckus, the plebians still weren't satisfied. They still were concerned about the about the senators and magistrates having so much power. Eventually twelve laws were written on wooden tablets stating all the traditional laws of Rome. Everyone had to memorize these twelve laws.