The base includes the material forces of production such as the labour, means of production and relations of production, i.e. the social and political arrangements that regulate production and distribution. From this base rises a superstructure of legal and political "forms of social consciousness" that derive from the economic base that conditions both the superstructure and the dominant ideology of a society. Conflicts between the development of material productive forces and the relations of production provokes social revolutions, whereby changes to the economic base leads to the social transformation of the superstructure.