Manumission
Manumission, from manumit , is the act of a slave owner freeing his or her slaves. Different approaches developed, each specific to the time and place of a society's slave system.
The motivations of slave owners in manumitting slaves were complex and varied. Firstly, manumission may present itself as a sentimental and benevolent gesture. One typical scenario was the freeing in the master's will of a devoted servant after long years of service. A trusted bailiff might be manumitted as a gesture of gratitude; for those working as agricultural laborers or in workshops, there was little likelihood of being so noticed.
Such feelings of benevolence may have been of value to slave owners themselves as it allowed them to focus on a "humane component" in the human traffic of slavery. In general, it was more common for older slaves to be given freedom, once they had reached the age where they were beginning to be less useful. Legislation under the early Roman Empire put limits on the number of slaves that could be freed in wills (Fufio-Caninian law 2 BC), which suggests that it had been widely used.