 As noted, traditionally Marx’s definition of exploitation is given in terms of the theory of surplus value, which in turn is taken to depend on the labour theory of value: the theory that the value of any commodity is proportional to the amount of “socially necessary” labour embodied in it. However, the question arises of whether the basic idea of exploitation should be so dependent on a particular theory of value. For if it is, the notion of exploitation becomes vulnerable to Robert Nozick’s objection: that if the labour theory of value can be shown to be faulty, the Marxist theory of exploitation collapses too (Nozick 1974).