On such assumptions I should guess that a properly run community equipped with modern technical resources, of which the population is not increasing rapidJy, ought to be able to bring down the marginal efficiency of capital in equilibrium approximately to zero within a single generation; so that we should attain the conditions of a quasi stationary community where change and progress would result only from changes in technique, taste, population and institutions, with the products of capital selling at a price proportioned to the labour, etc., embodied in them on just the same principles as govern the prices of consumption goods into which capital charges enter in an insignificant degree.