The obligation of blood revenge

In his work The Golden Horns:Mythic Imagination and the Nordic Past, John Greenway argues that the Icelandic family sagas (Islendigasogur) in relation to the Eddic myths and legends demonstrate “the displacement of the symbolic universe of myth to the human world of historical time the heart of the drama of the Norse apprehension of reality.” (39). Analyze and compare the following themes from the Eddas with the treatment given to the same or closely related themes in either The Saga of the People of Laxardale: “the obligation of blood revenge”