Henry R. Seager, The New International Encyclopædia (1905)
“ Value, even under conditions of free competition, does not tend, therefore, to be in proportion to quantity of labor, but to quantities of labor and capital. John Stuart Mill's observation that labor creates utilities, not matter, exposed the artificial character of Adam Smith's distinction between productive and unproductive labor. It is now recognized on all sides that the labor of physicians, lawyers, actors, etc., is just as productive as the labor of farmers and mechanics. All add to society's fund of consumable utilities, and this is the essence of production. ”
