Book excerpt: First published in 1973. Few concepts in the modern age have created more controversy in the discussion of social, moral, and political issues than that of ideology. Ever since the term was coined by Destutt de Tracy to refer to a scientific study of the origin of ideas, its meaning has undergone a series of mutation, until we have reached the stage where ideology can now be used to refer to almost any organized body of beliefs. Amidst these changes in the meaning of the term certain common preoccupations are detectable and certain fundamental problems remain. Is human reason capable of comprehending reality 'as it is'? Or is its approach necessarily influenced by the thinker's values, personal or class interests and personal or social prejudices? Is human reason a culturally neutral instrument or a socially acquired capacity that is unconsciously shaped by a particular historical age or society or class? There are fundamental problems too concerning the internal structure and rationale of specific ideologies such as conservatism, pluralism, and apartheid. This title will be of great interest to students of philosophy and politics.