A remark seems here necessary about the apparent inconsistency between this feeling of anxiety about strangers and the well-known ancient Italian practice of _hospitium_, by which two communities, or two individuals, or an individual and a community, entered into relations which bound them to mutual hospitality and kindness in case of need:[45] a practice so widely spread and so highly developed that it may be considered one of the most valuable civilising agents in the early history of Italy. There is, however, no real inconsistency here. In the first place, the stranger who was removed on the occasion of solemn public religious rites may be assumed not to have been in possession of the _ius hospitii_ with the Roman state, and in any case it must be doubtful whether that _ius_ would give him the right of being present at all sacrificial rites. Secondly, the researches of Dr. Westermarck have recently, for the first time, made it clear that both the taboo on strangers and the very widely-spread practice of hospitality can ultimately be traced down to the same root. The stranger is dangerous; but for that very reason it is desirable to secure his good-will at once. He may have the evil eye; but if so, it is as well to disarm him by offering him food and drink, and, when he has partaken of these, by entering into communion with him in the act of partaking also yourself. Expediency would obviously suggest some such remedy for the danger of his presence, and this would in course of time, in accordance with the instinct of Romans and Italians, grow into a set of rules sanctioned by law as well as custom--the _ius hospitii_.[46]