"The Marxian theory of ideology predicts that the ruling ideas in any well functioning society will be ideas that promote the interests of the ruling class in that society, i.e., the class that is economically dominant. By the “ruling ideas” we should understand Marx to mean the central moral, political and economic ideas that dominate discussion in the mass media and in the corridors of power in that society. The theory is not peculiar to Marx, since the “classical realists” of antiquity like the Sophists and Thucydides advanced essentially the same theory: the powerful clothe their pursuit of self-interest in the garb of morality and justice. When Marx says that, “The ideas of the ruling class are in every epoch the ruling ideas” (The German Ideology) and that, “Law, morality, religion are to [the proletariat] so many bourgeois prejudices, behind which lurk in ambush just as many bourgeois interests” (The Communist Manifesto), he is simply translating in to Marxian terms the Sophistic view “that the more powerful will always take advantage of the weaker, and will give the name of law and justice to whatever they lay down in their own interests.” (W.K.C. Guthrie, The Sophists (1971), p. 60)"