From what? The Constitution? No, the Constitution guaranteed slavery. Lincoln? No, he would continue slavery in order to preserve the union. From Northern abolitionists? No, there were just a handful and mostly in New England. From an army fighting to end slavery? No, the army was fighting to preserve the union. So why would an entire region secede because of slavery if what they were seceding from would not have prevented slavery?
Because while the Republicans were willing to accept slavery where it already existed, they were completely opposed to the expansion of slavery into the territories. Nothing, not the Corwin Amendment or the Republican Administration, guaranteed that a southern slave owner could move to any territory of the United States with his chattel. So the south took matters into their own hands, announced their secession, adopted a constitution that not only protected slavery and slave imports, but also guaranteed that any future states and territory would be slave, and launched their rebellion.
Ya got me, pal. I'm only going on what they said in the Declarations of Causes issued by the secession conventions...
TEXAS:"We hold as undeniable truths that the governments of the various States, and of the confederacy itself, were established exclusively by the white race, for themselves and their posterity; that the African race had no agency in their establishment; that they were rightfully held and regarded as an inferior and dependent race, and in that condition only could their existence in this country be rendered beneficial or tolerable.It's pretty plain that protecting slavery was why the south seceded.That in this free government all white men are and of right ought to be entitled to equal civil and political rights; that the servitude of the African race, as existing in these States, is mutually beneficial to both bond and free, and is abundantly authorized and justified by the experience of mankind, and the revealed will of the Almighty Creator, as recognized by all Christian nations; while the destruction of the existing relations between the two races, as advocated by our sectional enemies, would bring inevitable calamities upon both and desolation upon the fifteen slave-holding states.
GEORGIA:Such are the opinions and such are the practices of the Republican party, who have been called by their own votes to administer the Federal Government under the Constitution of the United States. We know their treachery; we know the shallow pretenses under which they daily disregard its plainest obligations. If we submit to them it will be our fault and not theirs. The people of Georgia have ever been willing to stand by this bargain, this contract; they have never sought to evade any of its obligations; they have never hitherto sought to establish any new government; they have struggled to maintain the ancient right of themselves and the human race through and by that Constitution. But they know the value of parchment rights in treacherous hands, and therefore they refuse to commit their own to the rulers whom the North offers us. Why? Because by their declared principles and policy they have outlawed $3,000,000,000 of our property in the common territories of the Union; put it under the ban of the Republic in the States where it exists and out of the protection of Federal law everywhere; because they give sanctuary to thieves and incendiaries who assail it to the whole extent of their power, in spite of their most solemn obligations and covenants; because their avowed purpose is to subvert our society and subject us not only to the loss of our property but the destruction of ourselves, our wives, and our children, and the desolation of our homes, our altars, and our firesides.
MISSISSIPPI: In the momentous step which our State has taken of dissolving its connection with the government of which we so long formed a part, it is but just that we should declare the prominent reasons which have induced our course.
Our position is thoroughly identified with the institution of slavery-- the greatest material interest of the world. Its labor supplies the product which constitutes by far the largest and most important portions of commerce of the earth. These products are peculiar to the climate verging on the tropical regions, and by an imperious law of nature, none but the black race can bear exposure to the tropical sun. These products have become necessities of the world, and a blow at slavery is a blow at commerce and civilization. That blow has been long aimed at the institution, and was at the point of reaching its consummation. There was no choice left us but submission to the mandates of abolition, or a dissolution of the Union, whose principles had been subverted to work out our ruin.
SOUTH CAROLINA: We affirm that these ends for which this Government was instituted have been defeated, and the Government itself has been made destructive of them by the action of the non-slaveholding States. Those States have assume the right of deciding upon the propriety of our domestic institutions; and have denied the rights of property established in fifteen of the States and recognized by the Constitution; they have denounced as sinful the institution of slavery; they have permitted open establishment among them of societies, whose avowed object is to disturb the peace and to eloign the property of the citizens of other States. They have encouraged and assisted thousands of our slaves to leave their homes; and those who remain, have been incited by emissaries, books and pictures to servile insurrection.
For twenty-five years this agitation has been steadily increasing, until it has now secured to its aid the power of the common Government. Observing the *forms* [emphasis in the original] of the Constitution, a sectional party has found within that Article establishing the Executive Department, the means of subverting the Constitution itself. A geographical line has been drawn across the Union, and all the States north of that line have united in the election of a man to the high office of President of the United States, whose opinions and purposes are hostile to slavery. He is to be entrusted with the administration of the common Government, because he has declared that that "Government cannot endure permanently half slave, half free," and that the public mind must rest in the belief that slavery is in the course of ultimate extinction.