C. Wright Mills - Military-industrial complex (MIC) is a concept commonly used to refer to policy relationships between governments, national armed forces, and industrial support they obtain from the commercial sector in political approval for research, development, production, use, and support for military training, weapons, equipment, and facilities within the national defense and security policy. It is a type of iron triangle.
Habermas - Historical materialism is a methodological approach to the study of society, economics, and history, first articulated by Karl Marx (1818-1883). Marx himself never used the term but referred to his approach as "the materialist conception of history." Historical materialism looks for the causes of developments and changes in human society in the means by which humans collectively produce the necessities of life. The non-economic features of a society (e.g. social classes, political structures, ideologies) are seen as being an outgrowth of its economic activity. The classic brief statement of the theory was made by Marx in the Preface to A Contribution to the Critique of Political Economy (1859).