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
This national decomposition is, like the whole age, far from pleasing, but also like that age significant and momentous. The circle of peoples, which we are accustomed to call the ancient world, advances from an outward union under the authority of Rome to an inward union under the sway of the modern culture resting essentially on Greek elements. Over the ruins of peoples of the second rank the great historical compromise between the two ruling nations is silently completed; the Greek and Latin nationalities conclude mutual peace.
The Greeks renounce exclusive claims for their language in the field of culture, as do the Romans for theirs in the field of politics; in instruction Latin is allowed to stand on a footing of equality--restricted, it is true, and imperfect-- with Greek; on the other hand Sulla first allows foreign ambassadors to speak Greek before the Roman senate without an interpreter. The time heralds its approach, when the Roman commonwealth will pass into a bilingual state and the true heir of the throne and the ideas of Alexander the Great will arise in the west, at once a Roman and a Greek.
The suppression of the secondary, and the mutual interpenetration of the two primary nationalities, which are thus apparent on a general survey of national relations, now fall to be more precisely exhibited in detail in the several fields of religion, national education, literature, and art.
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Reference address : https://www.ellopos.net/elpenor/rome/4-12-nationality-religion-education.asp?pg=10