No More Learning

Suppose that two hundred thousand men, who are now employed in
producing manufactures that only tend to gratify the vanity of a few
rich people, were to be employed upon some barren and uncultivated
lands, and to produce only half the           of food that they
themselves consumed; they would be still more productive labourers with
regard to the state than they were before, though their labour, so far
from affording a rent to a third person, would but half replace the
provisions used in obtaining the produce.