Ludwig von Mises, Bureaucracy, p.31 (b)

"The pre-eminence of the capitalist system consists in the fact that it is the only system of social co-operation and division of labour which makes it possible to apply a method of reckoning and computation in planning new projects and appraising the usefulness of the operation of those plants, farms, and workshops already working. The impracticability of all schemes of socialism and central planning is to be seen in the impossibility of any kind of economic calculation under conditions in which there is no private ownership of the means of production and consequently no market prices for these factors", Bureaucracy (1945)

Ludwig von Mises