"According to common law, the difference between a serf and a slave is that the lord of the manor is only entitled to one third of the fruits of a serf’s labor (income tax), either as crops or direct labor. On the other hand, there is no limit to how much can be taken from a slave."

"According to common law, the difference between a serf and a slave is that the lord of the manor is only entitled to one third of the fruits of a serf’s labor (income tax), either as crops or direct labor. On the other hand, there is no limit to how much can be taken from a slave."