Then had followed John Brown's attempt at Harper's Ferry to bring about that most terrible of all catastrophes, a slave insurrection. The attempt itself was so absurd in its lack of means conceivably adequate to the end proposed, and so clearly the work of a madman in that it involved a direct assault upon a national arsenal, making itself thus the insane challenge of a mere handful of men to the whole power of the United States, that it might have been dismissed from men's minds as men are accustomed to dismiss the vagaries of demented persons, but for one fact. The John Brown raid was seriously and earnestly approved by so many persons and pulpits and prints at the North, as was shown by funeral services and otherwise, that it was regarded at the South as a preliminary, typical, and threateningly suggestive manifestation of what Northern sentiment intended to do to the South whenever it should have the necessary power. How largely it was thus sanctioned was later shown by the fact that during the succeeding war the song that celebrated John Brown's raid made itself a national anthem declaring that in the advance of the national armies his "soul was marching on." To the Southern people John Brown's attempt to stir up servile insurrection meant all of horror, all of slaughter, all of outrage to women and children that it is possible to conceive. It meant to them the overturning of society. It meant the dominance of a subject and inferior race outnumbering the whites in many states, a race ignorant and passionate in Virginia and Kentucky, and well-nigh savage in the cotton states. It meant rapine and murder--rape, outrage and burning. There were still many at the South who desired and earnestly advocated the extirpation of slavery by any means that could be adopted with tolerable safety to Southern homes, but John Brown's program of abolition by servile war--a program which seemed to them to be accepted by Northern public sentiment--offered them a threat of desolation against which, if they were men, they were bound to revolt with all the force they could command. It called into instant and aggressive activity that fundamental impulse of humanity, the all-controlling instinct of self-preservation.