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
Men did not, if possible, steal outright; but all shifts seemed
allowable in order to attain rapidly to riches--plundering and
begging, cheating on the part of contractors and swindling on the part
of speculators, usurious trading in money and in grain, even the
turning of purely moral relations such as friendship and marriage to
economic account.
Marriage especially became on both sides an object
of mercantile speculation; marriages for money were common, and it
appeared necessary to refuse legal validity to the' presents which the
spouses made to each other. That, under such a state of things, plans
for setting fire on all sides to the capital came to the knowledge of
the authorities, need excite no surprise.
When man no longer finds
enjoyment in work, and works merely in order to attain as quickly as
possible to enjoyment, it is a mere accident that he does not become a
criminal. Destiny had lavished all the glories of power and riches
with liberal hand on the Romans; but, in truth, the Pandora's box was
a gift of doubtful value.