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
We have already spoken of the shape which the government of the subjects and the external policy of Rome assumed in their hands. In internal affairs they were, if possible, still more disposed to let the ship drive before the wind: if we understand by internal government more than the transaction of current business, there was at this period no government in Rome at all. The single leading thought of the governing corporation was the maintenance and, if possible, the increase of their usurped privileges.
It was not the state that had a title to get the right and best man for its supreme magistracy; but every member of the coterie had an inborn title to the highest office of the state--a title not to be prejudiced either by the unfair rivalry of men of his own class or by the encroachments of the excluded.
Do you see any typos or other mistakes? Please let us know and correct them
Reference address : https://www.ellopos.net/elpenor/rome/4-02-reform-tiberius-gracchus.asp?pg=3