The original ( French ) lyrics of the Internationale were written in 1870, the melody that we know ( the lyrics were originally sung with the melody of the Marseillaise ) was written 18 years later. I think it is a beautiful song ( within its context ). In my view the most interesting line, which could explain a lot about the behavior of some proletarians who reached positions of power, is "Nous ne sommes rien, soyons tout" ( We are nothing, let's be everything ). Happy Mayday!.