late 14c., "relation of incidents" (true or false), from Old French estoire, estorie "story; chronicle, history" (12c., Modern French histoire), from Latin historia "narrative of past events, account, tale, story," from Greek historia "a learning or knowing by inquiry; an account of one's inquiries; knowledge, account, historical account, record, narrative," from historein "be witness or expert; give testimony, recount; find out, search, inquire," and histōr "knowing, expert; witness," both ultimately from PIE *wid-tor-, from root *weid- "to see," hence "to know."

Thus it is related etymologically to Greek idein "to see," eidenai "to know," and to idea and vision. Beekes writes of histōr that "The word itself, but especially the derivations ... that arose in Ionic, have spread over the Hellenic and Hellenistic world together with Ionic science and philosophy." 

In Middle English it was not differentiated from story (n.1); the sense of "narrative record of past events" probably is first attested late 15c. The modern meaning "recorded events of the past" is from late 15c., as is use of the word in reference to a branch of knowledge. The meaning "a historical play or drama" is from 1590s.

The sense of "systematic account (without reference to time) of a set of natural phenomena" (1560s) is now obsolete except in natural history (as late as the 1880s published county histories in the U.S. routinely included natural history chapters, with lists of birds and fishes and illustrations of local slugs and freshwater clams). The meaning "an eventful career, a past worthy of note" (a woman with a history) is from 1852. To make history "be notably engaged in public events" is from 1862.

History is the interpretation of the significance that the past has for us. [Johan Huizinga, "The Task of the Cultural Historian"]

History is more or less bunk [Henry Ford, Chicago Tribune, May 25, 1916]

One difference between history and imaginative literature ... is that history neither anticipates nor satisfies our curiosity, whereas literature does. [Guy Davenport, "Wheel Ruts," 1996]

"generating or giving rise to ideas," 1839; see idea + -genous. A word from early psychology, apparently coined by Dr. Thomas Laycock, house surgeon to York County Hospital [Edinburgh Medical and Surgical Journal, vol. lii]. 

early 15c., "pertaining to an archetype or model," from Late Latin idealis "existing in idea," from Latin idea in the Platonic sense (see idea). Senses "conceived as perfect; existing only in idea," are from 1610s.

c. 1600, "imagine, form ideas," from idea + -ate (2). From 1862 as "to think." Related: Ideated; ideating.

"process or act of forming ideas," 1829; see idea + -ation. Related: Ideational.

As we say Sensation, we might say also, Ideation; it would be a very useful word; and there is no objection to it, except the pedantic habit of decrying a new term. [James Mill, "Analysis of the Phenomena of the Human Mind," London, 1829]

Related: Ideational.

"ideograph," 1837, from ideo-, here as a combining form of idea, + -gram.

"character or symbol which suggests an object without expressing its name," 1841, from ideo-, here as a combining form of idea, + -graph "instrument for recording; something written." Related: Ideographic (1822); ideographical.

1815, in reference to the French Revolutionaries, from French ideologue, from Greek idea (see idea) + -logos (see -logy). Earlier form was ideologist (1798).

1796, "science of ideas," originally "philosophy of the mind which derives knowledge from the senses" (as opposed to metaphysics), from French idéologie "study or science of ideas," coined by French philosopher Destutt de Tracy (1754-1836) from idéo- "of ideas," from Greek idea (see idea) + -logie (see -logy). With connective -o- because the elements are Greek and the Greek combining vowel is -o- for nouns of all declensions. Destutt published his Eléments d'idéologie 1801-1815.

The term ideology did not become widely employed in the nineteenth century, however, and I have not found that Emerson ever used it. It was only after the appearance of Karl Marx's long unpublished The German Ideology and Karl Mannheim's Ideology and Utopia in the period between the world wars of the twentieth century that the term became an omnipresent one. [Lewis P. Simpson, "Mind and the American Civil War," 1989]

Meaning "systematic set of ideas, doctrines through which the world is interpreted" was in use in English by 1907, earliest in socialist and communist writing, with reference to class; from 1918 it came to be used of socialism and communism themselves (along with fascism) and later more broadly still.

Ideology ... is usually taken to mean, a prescriptive doctrine that is not supported by rational argument. [D.D. Raphael, "Problems of Political Philosophy," 1970]

Proto-Indo-European root meaning "to see."

It forms all or part of: advice; advise; belvedere; clairvoyant; deja vu; Druid; eidetic; eidolon; envy; evident; guide; guidon; guise; guy (n.1) "small rope, chain, wire;" Gwendolyn; Hades; history; idea; ideo-; idol; idyll; improvisation; improvise; interview; invidious; kaleidoscope; -oid; penguin; polyhistor; prevision; provide; providence; prudent; purvey; purview; review; revise; Rig Veda; story (n.1) "connected account or narration of some happening;" supervise; survey; twit; unwitting; Veda; vide; view; visa; visage; vision; visit; visor; vista; voyeur; wise (adj.) "learned, sagacious, cunning;" wise (n.) "way of proceeding, manner;" wisdom; wiseacre; wit (n.) "mental capacity;" wit (v.) "to know;" witenagemot; witting; wot.

It is the hypothetical source of/evidence for its existence is provided by: Sanskrit veda "I know;" Avestan vaeda "I know;" Greek oida, Doric woida "I know," idein "to see;" Old Irish fis "vision," find "white," i.e. "clearly seen," fiuss "knowledge;" Welsh gwyn, Gaulish vindos, Breton gwenn "white;" Gothic, Old Swedish, Old English witan "to know;" Gothic weitan "to see;" English wise, German wissen "to know;" Lithuanian vysti "to see;" Bulgarian vidya "I see;" Polish widzieć "to see," wiedzieć "to know;" Russian videt' "to see," vest' "news," Old Russian vedat' "to know."