 The rules of gender and family hierarchy, ownership, inheritance, etc., were governed by that cult.Over time, need has led men to regularize and make more consistent their relations with one another, and the rules that govern the family were transferred to increasingly larger units, arriving eventually at the city.Therefore, the origin of the city is also religious, as is witnessed by the practice of lustration, a periodic purification ceremony in connection with the census of all citizens, and by the public banquets in honor of local gods.