“Thus the ancient city was transformed by degrees. In the beginning it was an association of some hundred chiefs of families. Later the number of citizens increased, because the younger branches obtained a position of equality. Later still, the freed clients, the plebs, all that multitude which during centuries had remained outside the political and religious association, sometimes even outside the sacred enclosure of the city, broke down the barriers which were opposed to them, and penetrated into the city, where they immediately became the masters.”