血讐（けっしゅう）あるいは血の紛争
Blood-feuds are a
tribal institution for they can only occur where a breach of law is
recognized since they are the way in which reparation is obtained. Fear
of incurring a blood-feud is,
in fact, the most important legal sanction within a tribe and the main
guarantee of an individual's life and property. If a community of one
tribe attempts to avenge a homicide on a community of another tribe a
state of intertribal war, rather than a state of feud, ensues, and
there is no way of settling the dispute by arbitration. (E.E.
Evans-Pritchard, The Nuer: a description of the modes of livelihood and
political institutions of a Nilotic people. Oxford: Clarendon Press.
1940. Pp.150-151)
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