In his Bloodtaking and Peacemaking (180-1), his study of Icelandic society, William Ian Miller distinguishes between feuds and “other types of violence like war, duels, or simple revenge killings that involve no one beyond the killer and his victim.” While he recognizes the difficulties of definition, he lays out seven “features and impressionist observations”: “1. Feud is a relationship (hostile) between two groups. “2. Unlike ad hoc revenge killing that can be an individual matter, feuding involves groups that can be... Read more