There is one strong argument in favor of negro slavery over all other slavery

There is one strong argument in favor of negro slavery over all other slavery: that is, being unfitted for the mechanic arts, for trade, and all skillful pursuits, leaves those pursuits to be carried on by the whites; and does not bring all industry into disrepute, as in Greece and Rome, where the slaves were not only the artists and mechanics, but also the merchants.
~ George Fitzhugh (1857)