The "blood of the Sun": on human sacrifice in the pre-Columbian tradition

The ancient traditions of Central and South America held that the Sun, as well as water, earth and the gods themselves, in order to prosper and guarantee the continuation of the world, had to be regularly fed with human blood, a concept that precisely among the Aztecs became of absolute, if not strictly obsessive, importance; nevertheless, the same conception was also found among the Maya, the Toltecs, the Olmecs and the Incas, as evidenced by the historical sources that have come down to us.