Question/Problem 5: What did Abraham Lincoln do to preserve the Union?

Physically speaking, we cannot separate. We cannot remove our respective sections from each other, nor build an impassable wall between them. A husband and wife may be divorced, and go out of the presence, and beyond the reach of each other; but the different parts of our country cannot do this. They cannot but remain face to face; and intercourse, either amicable or hostile, must continue between them. Is it possible then to make that intercourse more advantageous, or more satisfactory, after separation than before? Can aliens make treaties easier than friends can make laws? Can treaties be more faithfully enforced between aliens, than laws can among friends? Suppose you go to war, you cannot fight always; and when, after much loss on both sides, and no gain on either, you cease fighting, the identical old questions, as to terms of intercourse, are again upon you....

In your hands, my dissatisfied fellow countrymen, and not in mine, is the momentous issue of civil war. The government will not assail you. You can have no conflict, without being yourselves the aggressors. You have no oath registered in Heaven to destroy the government, while I shall have the most solemn one to 'preserve, protect and defend' it.

I am loth to close. We are not enemies, but friends. We must not be enemies. Though passion may have strained, it must not break our bonds of affection. The mystic chords of memory, stretching from every battle-field, and patriot grave, to every living heart and hearthstone, all over this broad land, will yet swell the chorus of the Union, when again touched, as surely they will be, by the better angels of our nature.

From Mario M. Cuomo and Harold Holzer, eds., Lincoln On Democracy (New York: HarperCollins Publishers, 1990), pp. 201-209.