Émile Louis Victor de Laveleye,
Popular Science Monthly
(1881)
“ To satisfy our rational wants we require food, clothing, and habitation suitable to the climate and season; to these we may add the cheap accessories which the progress of industrial art has put within the reach of all. The line between a consumption that is reasonable and one that is not so may be found in every case by answering the question whether the satisfaction which the desired object will procure is worth the time and effort necessary to produce it. If it is, I am right in procuring it; but, if to get it I have to divert human labor from a more useful destination, I am wrong. ”
