If there be any fact in our history beyond dispute it is that Roger Sherman expressed the universal sentiment of our fathers when he said, 'The abolition of slavery seemed to be going on in the United States, and the good sense of the several States would probably by degrees complete it'. In that spirit the compromises of the Constitution were made. Had not slavery at that time deprecated itself as an evil, the Constitution could not have been formed. Could the future have been foreseen, it would not have been formed. But, reasoning from the light they had, it was fair to believe as they believed, that, when the slave-trade was prohibited, the system would wither away under the double curse of Morality and Law.

The Present Aspect of the Slavery Question (1859)