Genius

Genius (pronounced jeen-yuhs)

(1) An exceptional natural capacity of intellect, especially as applied to creative and original work in science and art.

(2) A person having such capacity.

(3) As applied collectively, usually to a nation or period, a descriptor of characteristics said to have produced something exceptional.

(4) The guardian spirit of a place, institution etc (now rare), derived from Roman mythology, the guiding spirit who attends a person from birth to death.

(5) In Islamic (Arabic) mythology (as jinn or genie), a demon (often plural).

1350–1400 (for its adoption in English; 1640s for its modern sense): From the Middle English, from the Latin genius (inborn nature; a tutelary deity of a person or place; wit, brilliance) from gignere (to beget) or gignō (to beget, produce) from the Old Latin genō from the primitive Indo-European root ǵenh & gen(e)-yo- from gene- (give birth, beget) with derivatives referring to procreation and familial and tribal groups.  The sense of "characteristic disposition" of a person is from 1580s, the modern meaning "person of exalted natural mental ability" was first recorded in the 1640s.  In English, as in the French genie and the German Genius & Genie, the “talent” senses of genius were likely influenced by the Latin ingenium (innate quality, nature, character, temperament, talent, intellect).  Ingenium supplied both ingenious and engine, its stem sharing a parent in genius’s gignere.  That French derivative, genie, was used to translate the jinn in the English translation (1706-1721) of the One Thousand and One Nights (أَلْفُ لَيْلَةٍ وَلَيْلَةٌ‎ (Alf Laylah wa-Laylah), the collection of Middle Eastern folk tales compiled in Arabic during the Islamic Golden Age; this was because of its resemblance in sound and, to some extent, sense.  Genius is a noun & adjective and geniusness is a noun; the noun plural is geniuses when applied to people and genii when otherwise used.

Evolution of genius

Over two millennia the meaning of “genius” shifted from a guiding spirit which lived in everyone to a description of the intellectual brilliance known only to a few.  The idea began in Ancient Rome; a person’s “genius” dictated their unique personality and disposition but it was more than a thousand years before the word came to be used to describe not a spirit inspiring a talent but also the talent itself.  In Antiquity, every person had a genius, a kind of guardian spirit who guided them from birth to death. The male genius was a kind of incarnation of Jupiter, the chief male deity; the female, Juno.  Places (genius loci), objects, events, and institutions also had their own genii, and Romans would propitiate their genii at important moments in their lives.

A scoop from Just Jared.

When first used in English, people still spoke of “having a genius” but as more rational understandings of mental ability evolved, it became increasingly common to describe them as “being a genius”.  The two meanings ran in parallel for centuries and echoed the Christian concept of guardian angels.  The “good” spirit was called the bonus genius (1606), the bad the malus genius (1538), giving rise to the seventeenth century “evil genius”, conceived originally as a malevolent spirit which tries to make someone do evil and the evil genius persists and remains prevalent among both historians (it does seem often applied to certain figures in the Third Reich (1933-1945)) and popular culture.  In English, the early use of genius as a label tended to favor poets, the most popular writing of the age.  Poet and scholar Philip Sidney (1554-1586) wrote that poetry “…must not be drawn by the ears: it must be gently led, or rather, it must lead, which was partly the cause that made the ancient learned affirm it was a divine, and no human skill, since all other knowledges lie ready for any that have strength of wit; a poet no industry can make, if his own genius be not carried into it.”  It later became used about great composers and authors although some thought it might be too liberally applied, essayist and playwright Joseph Addison (1672–1719) noting in 1711 there “...is no character more frequently given to a writer, than that of being a genius. I have heard many a little sonneteer called a fine genius.”  Now, the best footballer, tennis player etc might often be called "a genius" although there is the occasional echo of the ancient tradition: an exceptional goal or point might be described as an "act of genius".  

Donald Trump (b 1946; US president 2017-2021) on Twitter 6 January 2018.

In the modern age, it’s applied to scientists, artists and, perhaps sometimes hyperbolically, to some of the better backs (though of course never the forwards) in rugby.  In 2018, Donald Trump tweeted he was not merely a genius but “…a very stable genius”.  Reaction was mixed but as a title it tempted Washington Post reporters Philip Rucker (b 1984) & Carol Leonnig (b 1966) who in 2020 published A Very Stable Genius: Donald J. Trump's Testing of America.  It focused on the first three years of his presidency, a period during which things seemed at the time to be a bit erratic but was tranquil compared with what was to follow.  Three years to the day after the famous tweet, a mob of Trump supporters stormed the United States Capitol Building in Washington DC in an attempt to overturn the results of the 2020 presidential election.  As a coda, Rucker & Leonnig in 2021 published I Alone Can Fix It: Donald J. Trump's Catastrophic Final Year.