Political revolution, that is, "founding the country", is to overthrow imperialism and establish a bourgeois democratic Republic. Only in this way can absolute monarchy be eradicated.
Social revolution, that is, "equal land rights", refers to the abolition of feudal land rights and the approval of national land prices. The existing land price belongs to the original owner, and the land price increased due to social progress after the revolution belongs to the state and is enjoyed by the people, so as to "give enough to others".
Sun Yat-sen put forward the Three People's Principles in order to overthrow the feudal rule of the Qing Dynasty, establish a bourgeois republic, prevent the polarization and opposition between the rich and the poor brought about by capitalism, and avoid the social drawbacks brought about by the European and American revolutions.
Drawing lessons from Europe and America, Sun Yat-sen put forward that "political revolution and social revolution should be made by World War I."
He wants to solve the serious wealth inequality and the contradiction between the bourgeoisie and the proletariat in China's future capitalist society.
The "nation" referred to by Sun Yat-sen is the Chinese nation.
The Three People's Principles is the guiding ideology of China's bourgeois democratic revolution, which guided the national bourgeoisie to overthrow the feudal autocratic monarchy system that existed in China for more than 2,000 years and established the Republic of China.