 By the “class function” of ideology is meant that Marx holds that the pervasiveness of ideology is explained by the fact it helps stabilise the economic structure of societies. All sorts of ideas might get generated for all sorts of reasons, but the ones that tend to “stick” (become widely accepted) in class-divided societies do so, not because of their truth, but because they conceal or misrepresent or justify flaws in that society in ways which redound to the benefit of the economically dominant class (Rosen &amp; Wolff 1996: 235–236).