Marx expressly discusses the result of communism being the abolition of the state, as you well know. The dictatorship of the proletariat is supposed to be a temporary situation. It's of course ridiculous and unworkable, as a cursory glance at any Marxist-Leninist or Marxist-Leninist-Maoist state will show, but that is at least the theory.
Historically speaking only Autocratic/Totalitarian (the most brutal statist) governments have enacted a Communist economic system at the national level. All have failed. The why of the failure is an interesting debate to have and we can get into Marx's thoughts that only post-industrial states could successfully adopt the Communist economic system. Since none have then perhaps that is why we have the 100% failure rate. Not to mention the tens of millions of people dead.
Perhaps it might work in a post-scarcity world, though even then I doubt it.
True, though Revolutionary Catalonia was largely nonviolent and anarchic. Its failure, of course, is a profound indictment of most strains of anarchic thought.
I don't know if communism will exist in a post-scarcity world, but I expect whatever economic forms exist will look closer to it than to our current capitalist model.
~Camilla
Ghavrel is Ghavrel is Ghavrel
*MySmiley*