By the Divine appointment the national life of Israel was bound up with the foundation and progress of true religion. It was in this people that the seeds of the highest religion were to be planted, and it was by means of it that all the nations of the earth were to be blessed. But as the chief means to this end was to be the higher ethical and religious character of the nation as such, the preservation of that from depravation and decay became the main anxiety of the prophets and priests and law-givers of Israel. Just as in modern days the preservation and defence of the State is reckoned in every country the supreme law which overrides every other consideration, so in Israel the preservation of the higher life was regarded. Rude and half-civilised as Israel was at the beginning of its career, the Divinely revealed religion had made men conscious of that which gave this people its unique value both to God and men. They recognised that its glory and strength lay in its thought of God, and in the character which this impressed upon the corporate life, as well as on the life of each individual. As we have seen, this bred in them a consciousness of a higher calling, of a higher obligation resting on them than upon others. They consequently felt the necessity of guarding their special character, and used the ban as their great weapon to ward off the contagion of evil, and to give this character room to develop itself. Its tremendous, even cruel, power was directed in Israel to this end; it was from this point of view alone that it had value in the eyes of the fully enlightened man of Israel. Stade in his history (vol. i., p. 490) holds that this distinction did not exist, that the Israelite view differed in little, if anything, from that of their heathen kinsmen, and that the ban resulted from a vow intended to gratify Yahweh and win His favour by giving Him the booty. But it is undeniable that in the earliest statement in regard to it (Exod. xx.) there is a distinct legislative provision that the ban should be proclaimed and executed irrespective of any vow; and in the later, but still early, notices of it in Joshua, Judges, and 1 Samuel the command to execute it comes in every case from Yahweh. In Deuteronomy, again, the ethical purpose of the ban is always insisted upon, most emphatically perhaps in chap. xx. 17 ff., where the _Cherem_ is laid down as a regular practice in war against the heathen inhabitants of Canaan: "But thou shalt utterly destroy them, ... that they teach you not to do after all their abominations, which they have done unto their gods; so should ye sin against Yahweh your God." Whatever hints or appearances there may be in the Scripture narratives that the lower view still clung to some minds are not to be taken as indicating the normal and recognised view. They were, like much else of a similar kind, mere survivals, becoming more and more shadowy as the history advances, and at last entirely vanishing away. The new and higher thought which Moses planted was the rising and prevailing element in the Israelite consciousness. The lower thought was a decaying reminiscence of the state of things which the Mosaic revelation had wounded to the death, but which was slow in dying.
In Israel, therefore, the ban was, on the principles of the higher religion, legitimate only where the object was to preserve that religion when gravely endangered. If any object could justify a measure so cruel and sweeping as the ban, this could, and this is the only ground upon which the Scriptures defend it. That the danger was grave and imminent, when Israel entered Canaan, cannot be doubted. As we have seen, the Israelite tribes were far from being of one blood or of one faith. There was a huge mixed multitude along with them; and even among those who had unquestioned title to be reckoned among Israelites, many were gross, carnal, and slavish in their conceptions of things. They had not learned thoroughly nor assimilated the lessons they had been taught. Only the elect among them had done that; and the danger from contact with races, superior in culture, and religiously not so far below the position occupied by the multitude of Israel, was extreme. The nation was born in a day, but it had been educated only for a generation; it was raw and ignorant in all that concerned the Yahwistic faith. In fact it was precisely in the condition in which spiritual disease could be most easily contracted and would be most deadly. The new religion had not been securely organised; the customs and habits of the people still needed to be moulded by it, and could not, consequently, act as the stay and support of religion as they did at later times. Further, the people were at the critical moment when they were passing from one stage of social life to another. At such moments there is immense danger to the health and character of a nation, for there is no unity of ideal present to every mind. That which they are moving away from has not ceased to exert its influence, and that _to_ which they are moving has not asserted itself with all its power. At such crises in the career of peoples emerging from barbarism, even physical disease is apt to be deadlier and more prevalent than it is among either civilised or entirely savage men. The old Semitic heathenism had not been entirely overcome, and the new and higher religion had not succeeded in establishing full dominion. Contact with the Canaanites in almost any shape would under such circumstances be like the introduction of a contagious disease, and at almost any price it had to be avoided. The customs of the world at that time, and of the Semitic nations in particular, offered this terribly effective weapon of the "ban," and for this higher purpose it was accepted; and it was enforced with a stringency which nothing would justify short of the fact that life or death to the great hope of mankind was involved in it.