blood sacrifices are par for the course in sub-saharan africa. im not sure they do either, but theres something in godless societies being drawn towards blood letting. not trying to change your mind though.
Discussion
I know about their existence. In ancient pagan times, they were very common. For example, in Euripides' tragedy "Iphigenia in Aulis," Iphigenia, Agamemnon’s daughter, is compelled to be sacrificed to secure the gods' help in the war against the Trojans. What I don’t understand is how a blood sacrifice can grant power and fame.