The class struggle is essentially a struggle over the surplus, and as such it is likely to continue as long as there is not a sufficiency for all. Class comes about whenever material production is so organised as to compel some individuals to transfer their surplus labour to others in order to survive. When there is little or no surplus, as in so-called primitive communism, everyone has to work, nobody can live off the toil of others, so there can be no classes. [...]