Human sacrifice
Human sacrifice is the act of killing one or more humans as part of a ritual, which is typically intended to please or appease gods, a human ruler, public or jurisdictional demands for justice by capital punishment, an authoritative/priestly figure, spirits of dead ancestors, or as a retainer sacrifice, wherein a monarch's servants are killed in order for them to continue to serve their master in the next life. Closely related practices found in some tribal societies are cannibalism and headhunting.