Atreus slaughtered Thyestes’ infant sons and served them up for dinner, so that Thyestes unsuspectingly ate the flesh of his own children. Of the brothers, one was a killer, the other an eater, but the worse pollution belonged to the
Burkert identifies the Atreus-Thyestes feast as the essential transgressive act across all mythological versions, and locates its deeper logic in the ritual-symbolic equivalence between animal sacrifice and human slaughter.
, Homo Necans: The Anthropology of Ancient Greek Sacrificial Ritual and Myth, 1972thesis