Complete the excerpt from “Cotton Is King” by James Henry Hammond by filling in the correct words based on the context. In all social systems there must be a class to do the menial duties, to perform the of life. That is, a class requiring but a low order of intellect and but little skill. Its requisites are vigor, docility, . Such a class you must have, or you would not have that other class which leads progress, civilization, and refinement.