This meant that the need for cheap labour was great and huge numbers of slaves meant a greater distance between slave and master and thus more room for cruelty. In earlier cultures race had little to do with who could be considered a slave. This made it easier for a slave to gain freedom and a slave could much easier fit into society. Also, there was always a risk of slaves rebelling and turning their former masters into slaves. Slave Nations in the Known World.
Slaves are common.
They are usually servants performing various tasks for their masters. A large numbers of slaves is a symbol of status. No more than 15 slaves are recommended, but many break this limit. It is considered a virtue to be kind to your slave. On the other hand, having disobedient slaves could mean a loss of face.