sentences:  What alternative institutions, practices, and messages are available to those who wish to reshape class formations within the framework of structural possibilities?” (46).The question of mediation, then, is a question, as Aune puts it, of how Marxist theory mediates “structural possibilities and popular struggle” (46).For Marx and Friedrich Engels, social actors are caught in a cycle of mediation between the economic base of a culture and the ideas and value systems of the culture that is given rise to by this base.