Does the slave class ever forgive their oppressors even after being set free?
Do some of you smart folks in here know of any ancient examples?
It depended on how the slaves were treated while in captivity. A large number of slaves in the American South maintained good relations with their former masters after emancipation because they had been treated humanely. I would hesitate to put a percentage on this, but, based on my reading of slave narratives and histories of the 19th-century South, I'd say perhaps 50% of slaves fell into this category.
It was not uncommon in ancient Greece and Rome for slaveholders to free their slaves, either out of kindness of heart or because they allowed the slave to earn enough money to pay for freedom. Again, how the freed slave viewed his ex-master depended on how he was treated while in captivity. If a master freed a slave because the slave was getting old and because he wanted to be rid of the cost of maintaining the old slave, that was a different story.