La lucha de clases

(Commonly said: "dominant ideology." This expression is incongruous. For what is ideology? It is precisely the idea insofar as it dominates: ideology can only be dominant. Correct as it to speak of an "ideology of the dominant class", because there is certainly a dominated class, it is quite inconsistent to speak of a "dominant ideology," because there is no dominated ideology: where the "dominated" are concerned, there is nothing, no ideology, unless it is precisely--and this is the last degree of alienation--the ideology they are forced (in order to make symbols, hence in order to live) to borrow from the class that dominates them. The social struggle cannot be reduced to the struggle between two rival ideologies: it is the subversion of all ideology which is in question.)

Roland Barthes, The Pleasure of the Text, 1973