Proletarians all over the world unite! (German: proletarian Ale L&; Auml ende, vereinigt euch! ) is the strategic slogan of the proletarian liberation movement and the motto of the national emblem of the Soviet Union. This slogan is the basic slogan of the proletarian political party, the product of the development of the workers' movement and the embodiment of Marxist proletarian internationalism. This slogan has two meanings; Emphasize the importance of alliance. The proletariat must recognize the common interests of the whole proletariat regardless of nationality, correctly handle the relationship between national tasks and international tasks, unite and help each other while striving for the victory of its own revolution, and fight for defeating the enemy and defending the common interests of * * *. Emphasize the class nature of union, which is the union of proletarians all over the world. It is by no means a combination without class boundaries like "everyone is a brother". Through the unity of proletarians all over the world, the proletariat formed a class, overthrew bourgeois rule and seized power. The struggle of the proletariat against the bourgeoisie has gone through the process from spontaneous to conscious, from decentralization to unity. In the struggle, the workers spontaneously demanded unity and struggle. From the unity in the factory to the unity of workers in an industry and a region, and then to the unity of the proletariat throughout the country. Finally, I realize that the proletariat cannot completely liberate itself by relying on the unity of the proletariat in a country, but it also needs the unity of the proletariat all over the world. This requirement was refined and summarized by Marx and Engels, and formed the strategic thought of uniting the proletarians all over the world. The reason why the proletariat of the whole world should unite is because the bourgeoisie faced by the proletariat of all countries is international. With the development of capitalism, capital has surpassed the scope of a country and become an international force. They not only exploit the proletariat and working people in their own country, but also exploit the proletariat and working people in other countries. As far as the proletariat and working people in all countries are exploited, oppressed, opposed and oppressed, the bourgeoisie in all countries is consistent and often United. 187 1 one of the reasons for the failure of the Paris commune was the joint suppression of the international bourgeoisie. 19 19 is one of the reasons for the failure of the Hungarian revolution. After the October Revolution, Russia was also interfered by the international bourgeoisie. The internationality of capitalist exploitation and oppression determines the internationality of proletarian liberation. If the proletariat wants to be liberated, it must not only oppose the domestic bourgeoisie, but also oppose the international capital forces. The joint action of the proletariat of all countries, at least the mutual support of the proletariat of several closely related countries, is one of the first conditions for proletarian liberation. One of the basic reasons why the Russian proletariat was able to smash the joint armed attack of 14 national bourgeoisie and defend the October Revolution was that the workers in western European countries understood and sympathized with the Russian proletariat and stood on the side of the Russian October Revolution. The victory of the China Revolution was also inseparable from the support of the Soviet Union at that time. In the process of revolution, I also got a lot of help from * * * international. The historical mission of the proletariat in all countries is international. As long as the international bourgeoisie exists, it is impossible to achieve the ultimate victory of socialism in the world, and it is impossible to finally complete the historical mission undertaken by the proletariat. The international solidarity of the proletariat must be based on a unified theoretical and political basis. We should be alert to the conspiracy activities of the bourgeoisie to undermine the international unity of the proletariat and to the separatist activities of bourgeois agents within the workers' movement; It is necessary to correctly handle the relations between socialist factions and between the production parties and workers' parties in various countries; We should oppose all kinds of national egoism and chauvinism of great powers. Only in this way can we maintain and strengthen the sincere unity and unity of the proletariat of all countries. For more than a century, with the widespread spread of Marxism, "the proletarians all over the world unite" has become the slogan of the common struggle of the proletarians all over the world.