William Smith,
A Smaller Dictionary of Greek and Roman Antiquities
“ Slavery existed almost throughout the whole of Greece; and Aristotle says that a complete household is that which consists of slaves and freemen, and he defines a slave to be a living working-tool and possession. None of the Greek philosophers ever seem to have objected to slavery as a thing morally wrong; Plato in his perfect state only desires that no Greeks should be made slaves by Greeks, and Aristotle defends the justice of the institution on the ground of a diversity of race, and divides mankind into the free and those who are slaves by nature ”
