Please note that Mommsen uses the AUC chronology (Ab Urbe Condita), i.e. from the founding of the City of Rome. You can use this reference table to have the B.C. dates
From: The History of Rome, by Theodor Mommsen
Translated with the sanction of the author by William Purdie Dickson
The growth of culture among the Romans did not at all keep pace with the development of the power of their community, and it was instinctively repressed rather than promoted by those in power. That there should be rich and poor, could not be prevented; but (as in a genuine community of farmers) the farmer as well as the day-labourer personally guided the plough, and even for the rich the good economic rule held good that they should live with uniform frugality and above all should hoard no unproductive capital at home--excepting the salt-cellar and the sacrificial ladle, no silver articles were at this period seen in any Roman house.
Nor was this of little moment. In the mighty successes which the Roman community externally achieved during the century from the last Veientine down to the Pyrrhic war we perceive that the patriciate has now given place to the farmers; that the fall of the highborn Fabian would have been not more and not less lamented by the whole community than the fall of the plebeian Decian was lamented alike by plebeians and patricians; that the consulate did not of itself fall even to the wealthiest aristocrat; and that a poor husbandman from Sabina, Manius Curius, could conquer king Pyrrhus in the field of battle and chase him out of Italy, without ceasing to be a simple Sabine farmer and to cultivate in person his own bread-corn.
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Reference address : https://www.ellopos.net/elpenor/rome/2-03-equalization-orders-aristocracy.asp?pg=34