(p.47) It is thus necessary, with regard to the concept of productivity of labour, to reject its narrow definition and to show that labour can only be productive in the sense of producing surplus value as long as it can tap, extract, exploit, and appropriate that labour which is spent in the production of life, or in subsistence production which is non-wage labour mainly done by women. As this production of life is the perennial precondition of all other historical forms of productive labour, including that under conditions of capital accumulation, it has to be defined as work and not as...