For our first examination of this argument, we turn to the justly celebrated speech at Peoria, October 16, 1854. Lincoln had actually begun to lose interest in politics when the passage of the highly controversial Kansas-Nebraska Bill in May, 1854, reawakened him. It was as if his moral nature had received a fresh shock from the tendencies present in this bill; and he began in that year the battle which he waged with remarkable consistency of position until he won the presidency of the Union six years later. The Speech at Peoria can be regarded as the opening gun of this campaign.

The speech itself is a rich study in logic and rhetoric, wherein one finds the now mature Lincoln showing his gift for discovering the essentials of a question. After promising the audience to confine himself to the “naked merits” of the issue and to be “no less than national in all the positions” he took, he turned at once to the topic of domestic slavery. Here arguments from the genus “man” follow one after another. Lincoln uses them to confront the Southern people with their dilemma.

Equal justice to the South, it is said, requires us to consent to the extension of slavery to new countries. That is to say, inasmuch as you do not object to my taking my hog to Nebraska, therefore I must not object to your taking your slave. Now, I admit that this is perfectly logical, if there is no difference between hogs and Negroes. But while you thus require me to deny the humanity of the Negro, I wish to ask whether you of the South, yourselves, have ever been willing to do as much?[83]

If the Southern people regard the Negro only as an animal, how do they explain their attitude toward the slave dealer?

You despise him utterly. You do not recognize him as a friend, or even as an honest man. Your children must not play with his; they may rollick freely with the little Negroes, but not with the slave dealer’s children. If you are obliged to deal with him, you try to get through the job without so much as touching him. It is common with you to join hands with men you meet, but with the slave dealer you avoid the ceremony—instinctively shrinking from the snaky contact. If he grows rich and retires from business, you still remember him, and still keep up the ban of non-intercourse upon him and his family. Now why is this? You do not so treat the man who deals in corn, cotton, or tobacco?[84]

Moreover, if the Negro is merely property, and is incapable of any sort of classification, what category is there to accommodate the free Negroes?

And yet again. There are in the United States and Territories, including the District of Columbia, 433,643 free blacks. At five hundred dollars per head, they are worth over two hundred millions of dollars. How comes this vast amount of property to be running about without owners? We do not see free horses or free cattle running at large. How is this? All these free blacks are the descendants of slaves, or have been slaves themselves; and they would be slaves now but for something which has operated on their white owners, inducing them at vast pecuniary sacrifice to liberate them. What is that something? Is there any mistaking it? In all these cases it is your sense of justice and human sympathy continually telling you that the poor Negro has some natural right to himself—that those who deny it and make mere merchandise of him deserve kickings, contempt, and death.[85]

The argument is clinched with a passage which puts the Negro’s case in the most explicit terms one can well conceive of. “Man” and “self-government,” Lincoln argues, cannot be defined without respect to one another.

The doctrine of self-government is right—absolutely and eternally right—but it has no just application as here attempted. Or perhaps I should rather say that whether it has such application depends upon whether a Negro is not or is a man. If he is not a man, in that case he who is a man may as a matter of self-government do just what he pleases with him.