The personal motives, arising out of an early and rather intimate family relationship with the Chinese nationalist movement centering around the person of Sun Yat-sen, that led the author to undertake this subject, have their advantages and disadvantages. The chief disadvantage lies in the fact that the thesis must of necessity treat of many matters which are the objects of hot controversy, and that the author, friendly to the movement as a whole but neutral as between its factions, may seem at times to deal unjustly or over-generously with certain persons and groups. The younger widow of Sun Yat-sen (née Soong Ching-ling) may regard the mention of her husband and the Nanking government in the same breath as an act of treachery. Devoted to the memory of her husband, she has turned, nevertheless, to the Left, and works on cordial terms with the Communists. She said: “... the Nanking Government has crushed every open liberal, democratic, or humanitarian movement in our country. It has destroyed all trade unions, smashed every strike of the workers for the right to existence, has thrown hordes of criminal gangsters who are simultaneously Fascist ‘Blue Shirts’ against every labor, cultural, or national revolutionary movement in the country.”(1) The author, from what he himself has seen of the National Government, is positive that it is not merely dictatorial, ruthless, cruel, treacherous, or historically unnecessary; nor would he, contrarily, assert that the National Government lives up to or surpasses the brilliant ideals of Sun Yat-sen. He seeks to deal charitably with all factions, to follow a middle course whenever he can, and in any case to state fairly the positions of both sides. The advantages may serve to offset the disadvantages. In the first place, the author’s acquaintance with the Nationalist movement has given him something of a background from which to present his exposition. This background cannot, of course, be documented, but it may serve to make the presentation more assured and more vivid. In the second place, the author has had access to certain private manuscripts and papers, and has had the benefit of his father’s counsel on several points in this work.(2) The author believes that on the basis of this material and background he is justified in venturing into this comparatively unknown field.