An intellectual is a person who engages in critical study, thought, and reflection about the reality of society, and proposes solutions for the normative problems of that society, and, by such discourse in the public sphere, he or she gains authority within the public opinion. Coming from the world of culture, either as a creator or as a mediator, the intellectual participates in politics, either to defend a concrete proposition or to denounce an injustice, usually by producing or by extending an ideology, and by defending a system of values.