Sun Yat-sen was a Chinese politician, statesman and ideologist. First President of the Republic of China and founder of the Kuomintang, he is considered both in the People's Republic of China and in the current Republic of China (Taiwan) as the father of modern China. In 1905, he founded the Alliance Society, a revolutionary organization to end the Manchu monarchy and establish a republican political model in China. The organization fostered a series of failed revolts, which led to the crisis in the late 1900s and led to the expulsion of Sun from various territories (Japan, French Indochina, British Malaysia ...). Sun did not abandon its subversive activities, but on the eve of the Xinhai Revolution that ended the monarchy its pre-eminence among the revolutionaries was declining.