ideology is the most prominent aspect of the superstructure, while in capitalist formations, ideologies such as liberalism and social democracy dominate. Hence the great importance of ideology justifies a society and politically confuses the alienated groups of society via false consciousness. Some explanations have been presented. Antonio Gramsci uses cultural hegemony to explain why the working-class have a false ideological conception of what their best interests are. Marx argued that "The class which has the means of material production at its disposal has control at the same time over the means of mental production." The Marxist formulation of "ideology as an instrument of social reproduction" is conceptually important to the sociology of knowledge, viz. Karl Mannheim, Daniel Bell, and Jürgen Habermas et al. Moreover, Mannheim has developed, and progressed, from the "total" but "special" Marxist conception of ideology to a "general" and "total" ideological conception acknowledging that all ideology (including Marxism) resulted from social life, an idea developed by the sociologist Pierre Bourdieu. Slavoj Žižek and the earlier Frankfurt School added to the "general theory" of ideology a psychoanalytic insight that ideologies do not include only conscious, but also unconscious ideas. Ideological state apparatuses (Althusser) French Marxist philosopher Louis Althusser proposed that ideology is "the imagined existence (or idea) of things as it relates to the real conditions of existence" and makes use of a lacunar discourse. A number of propositions, which are never untrue, suggest a number of other propositions, which are. In this way, the essence of the lacunar discourse is what is not told (but is suggested). For example, the statement "All are equal before the law," which is a theoretical groundwork of current legal systems, suggests that all people may be of equal worth or have equal opportunities. This is not true, for the concept of private property and power over the means of production results in some people being able to own more (much more) than others. This power disparity contradicts the claim that all share both practical worth and future opportunity equally; for example, the rich can afford better legal representation, which practically privileges them before the law. Althusser also proffered the concept of the ideological state apparatus to explain his theory of ideology. His first thesis was "ideology has no history": while individual ideologies have histories, interleaved with the general class struggle of society, the general form of ideology is external to history.