II.
The first that will be mentioned, of the _involuntary_, were _prisoners of war_.[007] "It was a law, established from time immemorial among the nations of antiquity, to oblige those to undergo the severities of servitude, whom victory had thrown into their hands." Conformably with this, we find all the Eastern nations unanimous in the practice.

The same custom prevailed among the people of the West; for as the Helots became the slaves of the Spartans, from the right of conquest only, so prisoners of war were reduced to the same situation by the rest of the inhabitants of Greece.

By the same principles that actuated these, were the Romans also influenced.

Their History will confirm the fact: for how many cities are recorded to have been taken; how many armies to have been vanquished in the field, and the wretched survivors, in both instances, to have been doomed to servitude?
It remains only now to observe, in shewing this custom to have been universal, that all those nations which assisted in overturning the Roman Empire, though many and various, adopted the same measures; for we find it a general maxim in their polity, that whoever should fall into their hands as a prisoner of war, should immediately be reduced to the condition of a slave.
It may here, perhaps, be not unworthy of remark, that the _involuntary_ were of greater antiquity than the _voluntary_ slaves.

The latter are first mentioned in the time of Pharaoh: they could have arisen only in a state of society; when property, after its division, had become so unequal, as to multiply the wants of individuals; and when government, after its establishment, had given security to the possessor by the punishment of crimes.