"An ideology (/ˌʌɪdɪˈɒlədʒi/) is a set of beliefs or philosophies attributed to a person or group of persons, especially as held for reasons that are not ...
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purely epistemic, in which "practical elements are as prominent as theoretical ones." Formerly applied primarily to economic, political, or religious theories and policies, in a tradition going back to Karl Marx and Friedrich Engels, more recent use treats the term as mainly condemnatory.
The term was coined by Antoine Destutt de Tracy, a French Enlightenment aristocrat and philosopher, who conceived it in 1796 as the "science of ideas" to develop a rational system of ideas to oppose the irrational impulses of the mob. In political science, the term is used in a descriptive sense to refer to political belief systems." - (en.wikipedia.org 11.08.2020)