"The marginal utility of money to any individual, i.e., the marginal utility derivable from the goods that can be obtained with the given quantity of money or that must be surrendered for the required money, presupposes a certain exchange-value of the money; so the latter cannot be derived from the former. 1 Those who have realized the significance of historically-transmitted values in the determination of the objective exchange-value of money will not find great difficulty in escaping from this apparently circular argument."