Answer:
Encomienda.
Step-by-step explanation:
This the labor system that Spanish applied to Native American. I consisted in rewarding conquerors with a group of people. That's why this was called the communal slavery.
This system wasn't invented by the Spanish empire. First was used by Iberians, such that the Crown granted a person a certain number of native slaves, all these instructions were given under the Christian faith, justifying their actions with an spiritual way.