 Currency is no longer needed, and all economic activity, enterprise, labour, production and consumption is freely exchanged "from each according to his ability, to each according to his needs".Communism is also a political system as much an economic one—with various models in how it is implemented—the well known being the Marxist Leninist model, which argues for the use of a vanguard party to bring about a workers state to be used as a transitional tool to bring about stateless communism, the economic arrangement described above.Other models to bring about communism include anarcho-communism, which argues similarly to Marxist schools for a revolutionary transformation to the above economic arrangement, but does not use a transitional period or vanguard party.