The theory of Sun Yat-sen in connection with the continuation of the old system is a significant one. His political doctrines, both ideological and programmatic, are original and not without great meaning in the development of an adequate and just state system in modern China. But this work might have been done, although perhaps not as well, by other leaders. The significance of Sun in his own lifetime lay in his deliberate championing of the cause of industrial revolution as the _sine qua non_ of development in China. In the epoch of the first Republic he relinquished the Presidency in favor of Yüan Shih-k’ai in order to be able to devote his whole time to the advancement of the railway program of the Republic. In the years that he had to spend in exile, he constantly studied and preached the necessity of modernizing China. Of his slogan, “Modernization without Westernization!” modernization is the industrial revolution, and non-Westernization the rest of his programs and ideology. The unity of Sun Yat-sen’s doctrines is apparent; they are inseparable; but if one part were to be plucked forth as his greatest contribution to the working politics of his own time, it might conceivably be his activities and plans for the industrial revolution. He spoke feelingly and bitterly of the miserable lives which the vast majority of his countrymen had to lead, of the expensiveness and insecurity of their material existences, of the vast, tragic waste of human effort in the form of man-power in a world where machine-power had rendered muscular work unnecessary. “This miserable condition among the Chinese proletariat [he apparently means the whole working class] is due to the non-development of the country, the crude methods of production, and the wastefulness of labor. The radical cure for all this is industrial development by foreign capital and experts for the benefit of the whole nation.... If foreign capital cannot be gotten, we will have to get at least their experts and inventors to make for us our own machinery....”(312) Howsoever the work was to be done, it had to be done. In bringing China into the modern world, in modernizing her economy, in assuring the justice of the new economy which was to emerge, Sun found the key in the physical advancement of China, in the building of vast railway systems, in creating ports “with future capacity equalling New York harbor,” in re-making the whole face of Eastern Asia as a better home for his beloved race-nation. The Social Revolution.