William Graham Sumner,
Earth-Hunger and Other Essays
(1913)
“ We see, therefore, that every natural agent is a natural monopoly. Men want land only for the sake of the standing-room, air, water, sunlight, animals, fish, trees, minerals, stone, lumber, firewood, etc., which they get out of it. In regard to every one of these things they are living and working under the conditions of monopoly. When the supply under any monopoly is indefinitely large with respect to the demand, the monopoly has no stringency or pressure and is of no importance; but as the demand rises the pressure of the monopoly advances in a progression to which no limits can be assigned. ”
