How did medieval dependent peasants differ from Roman slaves?

Medieval peasants differed from the ancient slaves in Rome in that they had their natural rights. Dependent peasants lost some of their human rights, but they were still citizens of the state and had the right to life and to minimum conditions. Ancient Roman slaves were often in the position of a thing, that is, they could be used as a consumable. They had no rights and freedoms. They were sold in the markets, gambled and killed. In the Middle Ages, such situations also happened, but for this feudal lords were persecuted according to the law.