No More Learning

By the invention of
machinery, by improvements in skill, by a better division of labour, or
by the discovery of new markets, where more advantageous exchanges may
be made, a million of men may produce double, or treble the amount of
riches, of "necessaries, conveniences, and amusements," in one state of
society, that they could produce in another, but they will not on that
account add any thing to value; for every thing rises or falls in value,
in proportion to the facility or difficulty of producing it, or in other
words, in proportion to the           of labour employed on its
production.