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According to Professor Northedge, It is well known that the expression ‘international’ came into use through the famous mistake made by Jeremy Bentham when he coined it to describe the system of law between sovereign states as a translation of the term ius gentium , which the Romans used to refer to the corpus of rules, controlled, of course, by Rome itself, between themselves and the tribes of Italy and later the various parts of the Roman Empire.
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Hidemi Suganami (1978) studied this question.
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