“In the forefront of that group of issues which, for more than a decade before the secession of the cotton States, kept the Northern and Southern sections of the United States in irritating controversy and a growing sense of enmity, was the question of whether the federal government should permit and protect the expansion of slavery into the western territories . . . It was upon this particular issue that a new and powerful sectional party appeared in 1854, that the majority of the Secessionists of the cotton States predicated their action in 1860-1861, and it was upon this also that President-elect Lincoln forced the defeat of the compromise measures in the winter of 1860-61.
It seems safe to say that had this question been eliminated or settled amicably, there would have been no secession and no Civil War . . .
Disregarding the stock arguments – constitutional, economic, social and what-not – advanced by either group, let us examine afresh the real problem involved. Would slavery, if legally permitted to do so, have taken possession of the territories or of any considerable portion of them?
The causes of the expansion of slavery westward from the South Atlantic coast are now well-understood. The industrial revolution [in the North and in England] and the opening of world markets had continually increased the consumption and demand for raw cotton, while the abundance of fertile and cheap cotton lands in the Gulf States had steadily lured cotton farmers and planters westward. Where large-scale production was [possible, the enormous demand for a steady supply of labor had made the use of slaves inevitable, for a sufficient supply of free labor was unprocurable on the frontier . . . and slave labor was usually not profitable in growing grain.
This expansion of the institution was in response to economic stimuli . . . [and the] movement would go on as long as far as suitable cotton lands were to be found or as long as there was a reasonable expectation of profit from slave labor, provided, of course, that no political barrier was encountered.
But by 1849-50 . . . and by the time the new Republican party was formed to check the further expansion of slavery, the westward march of the cotton plantation was evidently slowing down. The only possibility of a further westward extension of the cotton belt was in Texas. In that alone was the frontier line of cotton and slavery still advancing . . .
In New Mexico and Arizona, Mexican labor is cheaper than Negro labor, as has always been the case since the acquisition of the region from Mexico. It was well-understood by sensible men, North and South, in 1850 that soil, climate, and native labor would form a perpetual bar to slavery in the vast territory then called New Mexico. [By 1860], ten years after the territory had been thrown open to slavery, showed not a single slave; and this was also true of Colorado and Nevada. Utah, alone of all these territories, was credited with any slaves at all . . . [and] the census of 1860 showed two slaves in Kansas and fifteen in Nebraska.
The Northern anti-slavery men held that a legal sanction of slavery in the territories would result in the extension of the institution and domination of the free North by the slave power; prospective immigrants in particular feared that they would never be able to get homes in this new West. Their fears were groundless; but in their excited state of mind they could see neither the facts clearly nor consider them calmly.
In the cold facts of the situation, there was no longer any basis for excited sectional controversy over slavery extension . . . [but] the public mind had so long been concerned with the debate that it could not see that the issue had ceased to have validity. In the existing state of the popular mind, therefore, there was still abundant opportunity for the politician to work to his own ends, to play upon prejudice and passion and fear.”
(The Causes of the Civil War, Kenneth M. Stampp, Prentice-Hall Inc., 1965, pp. 86-91)