Society is a dialectical process: men produce society, which in turn produces them. Certain Marxist categories are especially useful for the sociology of knowledge, dealing with the relation between consciousness and society. Social structure is nothing but the result of human enterprise. Alienation-rupture between producer and product-leads to a false consciousness in neglecting the productive process. Reification, historically recurrent though not anthropologically necessary, while bestowing ontological status on social roles and institutions only sees society as producing men. Certain social conditions (...) encourage de-reification. Philosophy and sociology, superstructures rooted in intersubjectivity, must co-operate in pursuing the sociology of knowledge. (shrink)