We hope that we now have helped you to an understanding of the active principles each of free labor and of slave labor; how by reason of them the interests of north and south in dividing the public domain were in irreconcilable conflict; and how it was natural that the free States should band together against, and the slave States band together for, slavery. Thus the country split into two geographical though not political sections, the political division which ripened later being as yet only imminent and inchoate. That these sections had been made by deadly war between free labor and slave labor is all that we have to say here. The development went further, as we shall explain in the next chapter--all of it under the propulsion of the two active principles. They were always the ultimate and supreme motors. Often they are not to be seen at all. Still more often what they did was disguised. To read the facts of that time aright you must always and everywhere look for their work. Do that patiently, and you will detect every one of the many controversies over matters affecting an interest of either section as such--whether questions apparently of national politics, of morals, or religion, in newspapers, pamphlets, reviews, books, and all the vast contemporary literature, in the pulpit, on the platform, and in every place and corner of the entire land where policy and impolicy or right and wrong were mooted--to be but a part of one or the other of two great complexes of machinery, each geared to its particular motor and kept going by its mighty push. CHAPTER IV GENESIS, COURSE, AND GOAL OF SOUTHERN NATIONALIZATION