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334 abstain as much as possible from clogging the most efficient springs of social movement. Such motives were not of course confined to Rome, and the commerce of the Romans with their neighbours must have given them abundant opportunities for observing that the contracts before us tended everywhere to become Consensual, obligatory on the mere signification of mutual assent. Hence, following their usual practice, they distinguished these contracts as contracts Juris Gentium. Yet I do not think that they were so named at a very early period. The first notions of a Jus Gentium may have been deposited in the minds of the Roman lawyers long before the appointment of a Prætor Peregrinus, but it would only be through extensive and regular trade that they would be familiarised with the contractual system of other Italian communities, and such a trade would scarcely attain considerable proportions before Italy had been thoroughly pacified, and the supremacy of Rome conclusively assured. Although, however, there is strong probability that the Consensual Contracts were the latest-born into the Roman system, and though it is likely that the qualification, Juris Gentium, stamps the recency of their origin, yet this very expression, which attributes them to the "Law of Nations," has in modern times produced the notion of their extreme antiquity. For, when the "Law of Nations" had been converted into the "Law of