1846 In February, Marx and Engels living in Belgium established the Communist Communication Committee in Brussels, aiming at unifying all real revolutionary forces under the banner of scientific socialism through extensive publicity and laying the foundation for the establishment of working-class political parties. A few months later, many cities in London, Paris and Germany set up communication committees. Marx and Engels paid special attention to Germany's "right alliance" when establishing contacts with workers' organizations around the country. This alliance is a secret group composed of a group of petty-bourgeois democratic Republicans in 1836. They demanded the elimination of oppression and the establishment of a new society, and were ideologically influenced by Vitlin's doctrine, Proudhon's doctrine and "true socialism". After 1839, the activities of the right-wing alliance expanded to Switzerland, France and Britain and became an international organization. However, this alliance is not a proletarian party, and Marx and Engels began to fundamentally transform it to meet the needs of the proletarian revolutionary struggle.

To this end, Marx and Engels carried out a lot of meticulous and patient publicity and education work, and fought resolutely against various "socialist" schools such as Whiting's utopian socialism and the so-called "real socialism" of the petty bourgeoisie, which finally promoted the change of the views of the members of the alliance and further spread scientific communism among workers in European countries.

1847 In February, the leaders of the Justice League agreed to reorganize according to the opinions of Ma and En, and Ma and En were invited to join the League. 1in June, 847, the right-wing alliance held its first congress in London. According to Marne's proposal, it was decided to reorganize the right-wing alliance into a "communist alliance". The meeting entrusted Engels and others to draft the articles of association of the alliance. This constitution clearly puts forward the purpose of overthrowing bourgeois regime and establishing proletarian rule, and also puts forward the battle slogan of "proletarians all over the world, unite". The Communist League is the embryonic form of the first proletarian political party in the history of the world, and its constitution is the first party constitution in the history of the international communist movement. The "First Congress" of the Communist League shows that scientific socialism and its organizational principles have achieved great victory.

1847165438+1From October 29th to February 8th, the Communist League held its second congress in London, entrusting Marx and Engels to draft a new program of the League. This is the * * * declaration issued by 1848 in London in February. It marks the formal birth of scientific socialism and the beginning of the international communist movement. Since then, under the direct leadership of Marx and Engels, and under the guidance of the new constitution and program of the League, a new revolutionary course has begun.