http://en.wikipedia.org/wiki/World_communism
"Marxist theory may treat world communism as utopian, but it is the transition to world communism that attracts attention. World communism is to be achieved by world revolution, according to a theory that was popular in the period 1917 to around 1933 (at least). World communism is incompatible with the existence of nation-states, so according to an older theory there will be an abolition of the state preceding world communism."
It supports abolishing the nation state.