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48 settlers with a quickness unknown to the ancient world, where the original citizens of a commonwealth always believed themselves to be united by kinship in blood, and resented a claim to equality of privilege as a usurpation of their birthright. In the early Roman republic the principle of the absolute exclusion of foreigners pervaded the Civil Law no less than the Constitution. The alien or denizen could have no share in any institution supposed to be coeval with the State. He could not have the benefit of Quiritarian law. He could not be a party to the nexum which was at once the conveyance and the contract of the primitive Romans. He could not sue by the Sacramental Action, a mode of litigation of which the origin mounts up to the very infancy of civilisation. Still, neither the interest nor the security of Rome permitted him to be quite outlawed. All ancient communities ran the risk of being overthrown by a very slight disturbance of equilibrium, and the mere instinct of self-preservation would force the Romans to devise some method of adjusting the rights and duties of foreigners, who might otherwise—and this was a danger of real importance in the ancient world—have decided their controversies by armed strife. Moreover, at no period of Roman history was foreign trade entirely neglected. It was therefore probably half as a measure of police and half in furtherance of commerce that jurisdiction was first