The primitive religion, whose symbols were the immovable stone of the hearth, and the ancestral tomb, — a religion which had established the ancient … - Numa Denis Fustel de Coulanges

[The Plebeian] assemblies did not at first occupy themselves with the general interests of the city; they named no magistrates, and passed no laws. They deliberated only on the interests of their own order, named the plebeian chiefs, and carried plebiscita. There was at Rome, for a long time, a double series of decrees — senatusconsulta for the patricians, plebiscita for the plebs. The plebs did not obey the senatusconsulta, nor the patricians the plebiscita. There were two peoples at Rome. These two peoples, always in presence of each other, and living within the same walls, still had almost nothing in common. A plebeian could not be consul of the city, nor a patrician tribune of the plebs. The plebeian did not enter the assembly by curies, nor the patrician the assembly of the tribes. They were two peoples that did not even understand each other, not having — so to speak — common ideas. If the patrician spoke in the name of religion and the laws, the plebeian replied that he did not know this hereditary religion, or the laws that flowed from it. If the patrician alleged a sacred custom, the plebeian replied in the name of the law of nature. They reproached each other with injustice; each was just according to his own principles, and unjust according to the principles and beliefs of the other. The assembly of the curies and the reunion of the patres seemed to the plebeian odious privileges. In the assembly of the tribes the patrician saw a meeting condemned by religion. The consulship was for the plebs an arbitrary and tyrannical authority; the tribuneship, in the eyes of the patrician, was something impious, abnormal, contrary to all principles; be could not understand this sort of chief, who was not a priest, and who was elected without auspices. The tribuneship deranged the sacred order of the city; it was what a heresy is in religion — the public worship was destroyed. "The gods will be against us," said a patrician, "so long as we have among us this ulcer, which is eating us up, and which extends its corruption to the whole social body." ...The duality of the Roman population became from day to day more manifest.

[I]t does not appear that these men aspired at first to share the laws and rights of the patricians. Perhaps they thought, with the patricians themselves, that there could "be nothing in common between the two orders. No one thought of civil and political equality. That the plebeians could raise themselves to the level of the patricians, never entered the minds of the plebeian of the first centuries any more than it occurred to the patricians. ...[T]hese men seem to have preferred, at first, complete separation. In Rome they found no remedy for their sufferings; they saw but one means of escaping from their inferiority — this was to depart from Rome. ...In view of such an act the senate was divided in opinion. The more ardent of the patricians showed clearly that the departure of the plebs was far from afflicting them.. Thenceforth the patricians alone would remain at Rome with the clients that were still faithful to them. Rome would renounce its future grandeur, but the patricians would be masters there. They would no longer have these plebeians to trouble them, to whom the rules of ordinary government could not be applied, and who were an embarrassment to the city. ...But others, less faithful to old principles, or solicitous for the grandeur of Rome, were afflicted at the departure of the plebs. Rome would lose half its soldiers. What would become of it in the midst of the Latins, Sabines, and Etruscans — all enemies? The plebs had good qualities; why could not these be made use of for the interests of the city? These senators desired, therefore, at a cost of a few concessions, of which they did not perhaps see all the consequences, to bring back to the city those thousands of arms that made the strength of the legions. On the other side, the plebs perceived, at the end of a few months, that they could not live upon the Sacred Mount. They procured, indeed, what was materially necessary for existence, but all that went to make up an organized society was wanting. They could not found a city there, because they could not find a priest who knew how to perform the religious ceremony of the foundation. They could not elect magistrates, for they had no prytaneum with its perpetual fire, where the magistrate might sacrifice. They could find no foundation for social laws, since the only laws of which men then had any idea were derived from the patrician religion. In a word, they had not among them the elements of a city. The plebs saw clearly that by being more independent they were not happier; that they did not form a more regular society than at Rome; and that the problem, whose solution was so important to them, was not solved. ...It was found, therefore, that the plebs and patricians, though they had almost nothing in common, could not live without each other. They came together and concluded a treaty of alliance. This treaty appears to have been made on the same terms as those which terminate a war between two different peoples. Plebeians and patricians were indeed neither the same people nor the same city. By this treaty the patrician did not agree that the plebeian should make a part of the religious and political city; it does not appear that the plebs demanded it. They agreed merely that in the future the plebs, having been organized into something like a regular society, should have chiefs taken from their own number. This is the origin of the tribuneship of the plebs — an entirely new institution, which resembled nothing that the city had known before.

This right of citizenship then became precious, first, because it was complete, and secondly, because it was a privilege. Through it a man figured in the comitia of the most powerful city of Italy; he might be consul and commander of the legions. There was also the means of satisfying more modest ambitions; thanks to this right, one might ally himself, by marriage, to a Roman family; or he might take up his abode at Rome, and become a proprietor there; or he might carry on trade in Rome, which had already become one of the first commercial towns in the world. One might enter the company of farmers of the revenue, —that is to say, take a part in the enormous profits which accrued from the collection of the revenue, or from speculations in the lauds of the ager publicus. Wherever one lived, he was effectually protected; he escaped the authority of the municipal magistrate and was sheltered from the caprices of the Roman magistrates themselves. By being a citizen of Rome, a man gained honor, wealth, and security. The Latins, therefore, became eager to obtain this title, and used all sorts of means to acquire it.