Slavery was a prominent part of greek (esp. Athenian) society but it is largely invisible in the evidence that they have left. Slaves made up a large portion of the population in athens. Two generalizations: (1) at all times and in all places the ancient greek world relied on some form (or forms) of dependent labor to meet its needs. Work performed under compulsions other than those of kinship or communal obligations. (2) there were always free men engaged in productive labor. Free men working on their own making a living by working. A slave is a person who is in the eyes of the law and of public opinion a possession of another person. One person can own another and this person is their property. Slavery in the ancient world was a basic fact: slide: pseudo-aristotle quote. He says that the most necessary and best kind of property is man.