Socially, intellectuals constitute the intelligentsia, a status class organised either by ideology (conservative, fascist, socialist, liberal, reactionary, revolutionary, democratic, communist intellectuals, et al.), or by nationality (American intellectuals, French intellectuals, Ibero–American intellectuals, et al.). The contemporary intellectual class originated from the intelligentsiya of Tsarist Russia (c. 1860s–1870s), the social stratum of those possessing intellectual formation (schooling, education, Enlightenment), and who were Russian society's counterpart to the German Bildungsbürgertum and to the French bourgeoisie éclairée, the enlightened middle classes of those realms.
In the 20th century, the term Intellectual acquired positive connotations of social prestige, derived from possessing intellect and intelligence, especially when the intellectual's activities exerted positive consequences in the public sphere and so increased the intellectual understanding of the public, by means of moral responsibility, altruism, and solidarity, without resorting to the manipulations of populism, paternalism, and incivility (condescension). Hence, for the educated person of a society, participating in the public sphere—the political affairs of the city-state—is a civic responsibility dating from the Græco–Latin Classical era.
The determining factor for a Thinker (historian, philosopher, scientist, writer, artist, et al.) to be considered a public intellectual is the degree to which he or she is implicated and engaged with the vital reality of the contemporary world; that is to say, participation in the public affairs of society. Consequently, being designated as a public intellectual is determined by the degree of influence of the designator's motivations, opinions, and options of action (social, political, ideological), and by affinity with the given thinker; therefore:
The Intellectual is someone who meddles in what does not concern him. (L'intellectuel est quelqu'un qui se mêle de ce qui ne le regarde pas.)
Analogously, the application and the conceptual value of the terms Intellectual and the Intellectuals are socially negative when the practice of intellectualityis exclusively in service to The Establishment who wield power in a society, as such:
The Intellectuals are specialists in defamation, they are basically political commissars, they are the ideological administrators, the most threatened by dissidence.
Noam Chomsky's negative view of the Establishment Intellectual suggests the existence of another kind of intellectual one might call "the public intellectual," which is:
... someone able to speak the truth, a ... courageous and angry individual for whom no worldly power is too big and imposing to be criticised and pointedly taken to task. The real or true intellectual is therefore always an outsider, living in self-imposed exile, and on the margins of society. He or she speaks to, as well as for, a public, necessarily in public, and is properly on the side of the dispossessed, the un-represented and the forgotten.
The intellectual is a type of intelligent person, who is associated with reason and critical thinking. Many everyday roles require the application of intelligence to skills that may have a psychomotor component, for example, in the fields of medicine or the arts, but these do not necessarily involve the practitioner in the "world of ideas". The distinctive quality of the intellectual person is that the mental skills, which one demonstrates, are not simply intelligent, but even more, they focus on thinking about the abstract, philosophical and esoteric aspects of human inquiry and the value of their thinking.
The intellectual and the scholarly classes are related; the intellectual usually is not a teacher involved in the production of scholarship, but has an academic background, and works in a profession, practices an art, or a science. The intellectual person is one who applies critical thinking and reason in either a professional or a personal capacity, and so has authority in the public sphere of their society; the term intellectual identifies three types of person, one who: