A Roman denarius from 63 BC shows a voter casting a ballot, but the story of Roman tribes begins much earlier. Tradition holds that Romulus created three tribes shortly after founding Rome: the Ramnes, Tities, and Luceres. Each tribe divided into ten curiae, which served as voting units for the comitia curiata. These original three tribes eventually vanished from history, though their curiae persisted through Roman times. The etymology of tribus remains unclear, possibly relating to the word for three or referring to community divisions. After the Rape of the Sabine Women, peace concluded with Romulus and Titus Tatius ruling jointly. A large Sabine population relocated to Rome, creating an even division between Latins and Sabines around 750 BC. Scholars debate whether these first tribes represented distinct ethnic groups. Some suggest the Ramnes were Latin, the Tities were Sabine, and the Luceres were Etruscan. By the sixth century BC, Rome had a substantial Etruscan element, with the fifth and seventh kings being Etruscan. Many cultural institutions originated from Etruscan influence. However, modern scholarship rejects the idea that the three tribes were distinct ethnic groups. This theory lacks support in ancient sources and appears influenced by nationalist politics of later centuries.
Servian Administrative Reforms
King Servius Tullius restructured tribal divisions when he became the sixth king of Rome. He abolished the Romulean tribes while preserving their curiae. Servius divided Rome into four urban tribes and established twenty-six rural districts that coalesced into seventeen rural tribes. These new units served both territorial and administrative functions. Officials called tribuni militum counted votes and facilitated tribal organization. Another group coordinated gifts among tribe members and frequently engaged in electoral bribery during the late Republic. Additional officers included a curator tribuum who headed each tribe and tribunes of the treasury responsible for financial obligations. They collected war taxes and distributed pay to soldiers. Membership in a tribe proved Roman citizenship and formed the basis for army levies. Toward the end of the Republic, tribal affiliation became so significant it appeared as part of a citizen's name. It typically appeared between filiation and cognomina in formal documents and inscriptions. The names of the four urban tribes reflected city regions: Collina, Esquilina, Palatina, and Suburana. Rural tribe names likely derived from families owning substantial land tracts in those areas.