The last king, the Etruscan Lucius Tarquinius Superbus, received the nickname Superbus (arrogant) because of his autocratic behavior. He was ultimately expelled along with his family when the Roman people decided they had had enough of him and kings in general. The orchestrator of the coup was Lucius Junius Brutus, nephew of the king and a republican idealist. In the first act after the expulsion of Superbus, Brutus made the Roman people swear allegiance to the new political system:
Omnium primum avidum novae libertatis populum, ne postmodum flecti precibus aut donis regiis posset, iure iurando adegit neminem Romae passuros regnare.