The paradox of calling the same human beings persons and property brings the cause of the Civil War into the sharpest focus. A person by definition is a being possessed of a rational will. A chattel by equal definition is a piece of movable property without a rational will. Because a horse or a dog lacks a rational will, its owner is responsible for any damage or injury it may cause. But slaves were held as responsible for their own actions, as were their masters, under the criminal codes of the slave states. The slave owners, in seeking to have the slaves counted as five-fifths, were asserting that they were full human beings. At the same time, by claiming the right to their labor as chattels, they were asserting them to be sub-human. How the slaves could be both was something that Jefferson Davis and his friends never explained.
Harry V. Jaffa