The primary practice of ancient Mediterranean religion was animal sacrifice, which included killing one or more animals and giving them to the gods. Animals and people wellbeing were believed to be promoted via ancient blood sacrifices as component of a living cycle. Christians and pagans both condemned such sacrifices throughout the Empire. The pagan and Christian criticisms of Greco-Roman blood sacrifices are discussed in this article. In the ancient sacrificial discourse, authority was based on the cultic slaughter of animals and the distribution and consumption of their flesh.