"Proletarians all over the world unite" was first written into the constitution of the * * * producers' union drafted by friedrich engels and william wolf at the first congress of the * * * producers' union in June 1847, and the old slogan of "brothers all over the world" was replaced by the vague boundary of the former justice union. 18471during the second congress of the proletarian league from October 29th to February 8th, Karl Marx and Engels were entrusted by the congress to draft a new program of the league, and this slogan was formally written into the first programmatic document of the proletarian party, the * * Declaration of the Proletarian Party.