Since our ancestors wrote their diaries literally in stone with blood from animals (humans included). I think it’s time to discuss cultural phenomenas that involves said things.
Stone age saw these rituals as a way to produce good omen. For example for the hunt or gathering of herbs. A form of very early religion.
In some ancient cultures, viking/aztec for example, it were commonplace to sacrifice live beings (often other humans) to a pantheon of gods. To heighten the morale of the tribe before a battle.
Where I try to drive this discussion to is; if we choose to be a predatory being, maybe we should also get this tradition to evolve with us? Maybe even be part of our later civilisations culture in the industrial age.