1in June, 847, Engels attended the first congress of the right alliance held in London. The congress renamed the right-wing alliance as the producers' alliance, replacing the old slogan of "proletarians all over the world unite" Engels also drafted the first draft program for the alliance-"Draft of * * * * Doctrine". The draft was written in the form of question and answer, which was easily accepted at that time. In the same year, from the end of 10 to the beginning of 1 10, Engels revised and supplemented the draft program on the basis of soliciting the opinions of the members of the alliance, and wrote the * * * Principles. The principle is still in the form of question and answer, which basically maintains the original structure of the draft, but the content is very rich. 1847165438+129 October to 65438+8 February, the second congress of the proletarian league was held in London, attended by Marx and Engels. In addition to the representatives of Germany, representatives of Switzerland, Poland and Britain also attended the meeting. After in-depth discussion, the congress adopted the opinions of Marx and Engels, decided to publish the "Alliance" program in the form of a "declaration", and entrusted the drafting work to Marx and Engels. Marx and Engels, on the basis of the two drafts of "Productive Doctrine" and "Productive Principle", thought that the Party's program should be written as a declaration of battle according to the principles of the program adopted by the Congress. It took them a whole month to write the Manifesto of the Productive Party, 65438+, in the form of "narrating history". So far, the Declaration has been published in more than 200 languages, with more than 1 100 versions. It is recognized as the "most widely spread social and political document" in the world and is the guide of the world proletarian liberation movement.