The chief means to which the Romans, even from the earliest ages, had
recourse for securing their conquests, and at the same time relieving
the poorer classes of citizens, was the establishment of colonies in
the conquered states. The new citizens formed a kind of garrison, and
were held together by a constitution formed on the model of the parent
state. From what has been said above, it is evident that a law for
sending out a colony was virtually an agrarian law, since lands were
invariably assigned to those who were thus induced to abandon their
homes.

The relations between Rome and the subject cities in Italy were very
various. Some, called _municipia_, were placed in full possession of
the rights of Roman citizens, but could not in all cases vote in the
comitia. The privileges of the colonies were more restricted, for they
were absolutely excluded from the Roman comitia and magistracies. The
federative[2] states enjoyed their own constitutions, but were bound
to supply the Romans with tribute and auxiliary forces. Finally, the
subject states were deprived of their internal constitutions, and were
governed by annual prefects chosen in Rome.

Before discussing the subject of the Roman constitution, we must
observe that it was, like our own, gradually formed by practice; there
was no single written code like those of Athens and Sparta, but
changes were made whenever they were required by circumstances; before
the plebeians obtained an equality of civil rights, the state neither
commanded respect abroad, nor enjoyed tranquillity at home. The
patricians sacrificed their own real advantages, as well as the
interests of their country, to maintain an ascendancy as injurious to
themselves, as it was unjust to the other citizens. But no sooner had