What did the Incas do with the prisoners of war, if they had almost no human victims, and there were few slaves?

As a rule, the Incas returned prisoners of war to their native villages and made them taxable. It was more profitable for the conquerors.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.