Diary of John Quincy Adams: February 24, 1820

I had some conversation with Calhoun on the slave question pending in Congress. He said he did not think it would produce a dissolution of the Union, but, if it should, the South would be from necessity compelled to form an alliance, offensive and defensive, with Great Britain.

I said that would be returning to the colonial state.

He said, yes, pretty much, but it would be forced upon them. I asked him whether he thought, if by the effect of this alliance, offensive and defensive, the population of the North should be cut off from its natural outlet upon the ocean, it would fall back upon its rocks bound hand and foot, to starve, or whether it would not retain its powers of locomotion to move southward by land. Then, he said, they would find it necessary to make their communities all military. I pressed the conversation no further; but if the dissolution of the Union should result from the slave question, it is as obvious as anything that can be foreseen of futurity, that it must shortly afterwards be followed by the universal emancipation of the slaves. A more remote but perhaps not less certain consequence would be the extirpation of the African race on this continent, by the gradually bleaching process of intermixture, where the white portion is already so predominant, and by the destructive progress of emancipation, which, like all great religious and political reformations, is terrible in its means, though happy and glorious in its end. Slavery is the great and foul stain upon the North American Union, and it is a contemplation worthy of the most exalted soul whether its total abolition is or is not practicable: if practicable, by what means it may be effected, and if a choice of means be within the scope of the object, what means would accomplish it at the smallest cost of human sufferance. A dissolution, at least temporary, of the Union, as now constituted, would be certainly necessary, and the dissolution must be upon a point involving the question of slavery, and no other. The Union might then be reorganized on the fundamental principle of emancipation. This object is vast in its compass, awful in its prospects, sublime and beautiful in its issue. A life devoted to it would be nobly spent or sacrificed. This conversation with Calhoun led me into a momentous train of reflection. It also engaged me so much that I detained him at his office, insensibly to myself, till near five o'clock, an hour at least later than his dining-time.

SOURCE: Charles Francis Adams, Editor, Memoirs of John Quincy Adams: Comprising Portions of His Diary from 1795 to 1848, Volume 4, p. 530-1