Class

Class (pronounced klas or klahs)

(1) A number of persons or things regarded as forming a group by reason of common attributes, characteristics, qualities, or traits; kind; sort.

(2) A collection or division of people or things sharing a common characteristic, attribute, quality, or property

(3) A group of persons sharing a similar social position and certain economic, political, and cultural characteristics

(4) In educational use: (1) The period during which a group of students meets for instruction, (2) A group of students meeting regularly to study a subject under the guidance of a teacher or (3) the physical classroom.

(5) Collectively (as “class of YYYY”), all students in the institution who graduated that year, the concept extended also to politicians in an assembly all elected at the same election.

(6) A social stratum sharing basic economic, political, or cultural characteristics, and having the same social position; caste.

(7) In sociology, political science & economics, the system of dividing society on that basis; (ruling class, upper class, middle class, working class etc); of late extended to include concepts such as “political class”, “entrepreneurial class”, “creative class” etc; in Marxist theory, a group of persons sharing the same relationship to the means of production & distribution.

(8) Social rank, especially high rank.

(9) Elegance, grace, or dignity, as in dress and behavior.

(10) The members of a given group in society, regarded as a single entity.

(11) Any division of persons or things according to rank or grade.

(12) Excellence; possessing exceptional merit; in informal use, the best or among the best of its kind (sometimes as “touch of class”).

(13) In Hinduism, any of the four social divisions, the Brahman, Kshatriya, Vaisya, and Shudra, of Hindu society; varna.

(14) Any of several grades of accommodation available on ships, airplanes, trains and such.

(15) In biology, the usual major subdivision of a phylum or division in the classification of organisms, usually consisting of several orders.

(16) In British and Commonwealth universities, the groups into which candidates for honors degrees are divided according to merit on the basis of final examinations or other method of assessment (first class, second class, third class and sometimes graduated (class 2A, 2B etc).

(17) In Ecclesiastical use (early Methodism, as classis), one of several small companies, each composed of about twelve members under a leader, into which each society or congregation was divided.

(18) In statistics, a grouping of data values in an interval, often used for computation of a frequency distribution.

(19) In mathematics (set theory), a collection of sets definable by a shared property, especially one which is not itself a set (in which case the class is called proper).  To please the nerds, every set is a class, but classes are not generally sets.  A class that is not a set is called a proper class.

(20) In computer programming (object-oriented), a set of objects having the same behavior (but typically differing in state), or a template defining such a set in terms of its common properties, functions etc.

(21) To place or arrange in a class; classify; to take or have a place in a particular class.

(22) As “class up” to improve the quality, tone, or status of; add elegance, dignity, style etc.

1590–1600: From the earlier Middle English classis (plural classes), from the fourteenth century French classis, from the Latin classis (a class or division of the people, assembly of people, the whole body of citizens called to arms, the army, the fleet, later a class or division in general, the singular form a back formation from the plural), from the primitive Indo-European kele- (to call, shout).  Classis displaced the Old English ġecynd.  The original use in the late sixteenth century was of a “group of students” (ie number of pupils in a school or college of the same grade) and that in North America became the standard form, enduring to this day.  The Latin classis was most used in military matters (of the army and the sea-fleet) and applied particularly to “a class, a division; army, fleet”, especially “any one of the six orders into which Servius Tullius (sixth king of Rome, reigning 578-535 BC) divided the Roman people for purposes of taxation” (traditionally, originally “the people of Rome under arms” (a sense in use in English by at least the 1650s), and akin to calare (to call (to arms)), thus the link with the primitive Indo-European kele- (to call, shout)).  Class is the standard abbreviation of classification and sometimes is used also for “classical” and “classified”.  The word is for many purposes used as a modifier and there are more than a hundred including asset class, business class, closed class, economy class, first class, leisure class, middle class, night class, professional class, school class, social class, working class. class action, type class, cruiser class, cattle class, class A, classable, class-based, class-conscious, classicide, classism, classist, class warrior, creative class, criminal class, high-class, low class, pseudoclass, ruling class, working-class, class enemy, class struggle and class reunion.

The 19BB (“Barrier Boat”, though sailor's slang is “Boomin’ Beaver”) is a specialized class of miniature tugboat used to deploy and maintain port security booms surrounding Navy ships and installations in port.  The smallest vessels on the USN's (US Navy) active list, the story Donald Trump (b 1946; POTUS 2017-2021 and since 2025) wanted to rename the BBs “Biden Class” (after Joe Biden (b 1942; VPOTUS 2009-2017 & POTUS 2021-2025)) apparently apocryphal.

Borrowing from the concept of classifications in educational & military use, the adoption in science for taxonomy (group of related plants or animals) dates from 1753 and has since been much expanded.  Dictionaries, perhaps surprisingly cite the 1870s as the origin of class being used with the meaning “high quality”, despite the sense of “a division of society according to status” (upper, lower, etc.) being in use since the early 1700s and the idea in societies of a “class-consciousness” will be ancient although it was only in 1903 the term entered English, from the German compound noun Klassenbewusst.  Special adaptations include the nouns classeme (in semiotics a generic or contextual seme, denoting a group of objects) & classitis (in web design, a critique of authoring stylesheets with redundant and semantically unhelpful classes).  Classy endures as an adjective (meaning “elegant; stylish) but the noun classy (also as clashee & clashy) is long obsolete.  Under the Raj, a classy (from khalasi) was an Indian worker at a port or dockyard, traditionally employed in pulling vessels out of the water for maintenance and repair and returning them to the water upon completion; the anglicized forms came ultimately from the Hindi ख़लासी (xalāsī), from the Classical Persian خلاصی (xalāsī).  Class is a noun, verb & adjective, classism & classer are nouns, classist & classful are nouns & adjectives, classable, classy, classless & classlike are adjectives, declass is an adjective, classed is a verb, classing is a noun & verb, classwide is an adjective & adverb and classward is an adverb; the noun plural is classes

Classy look: Lindsay Lohan rendered in the style of nineteenth century Impressionism by Gemini.ai.  The digital version was based on a photograph of her in a Jil Sander (b 1943) gown while attending the Disney Legends Awards ceremony, Anaheim, California, August, 2024.  On the day, although the environment was not optimized for photography, the light and even the breeze cooperated, the gown’s fabric swishing in a way the Impressionists would have painted, even had the air been still.

In the context of a group of people sharing the same social, economic, or occupational status, the term “class” implies usually a social and economic hierarchy in which those of higher class standing have greater status, privilege, prestige, and authority. Western societies traditionally have been divided into three classes: the upper (or leisure), middle (bourgeoisie) & lower (working) class (for Marxists, the significant classes were the bourgeoisie and proletariat although neo-Marxists have for decades adjusted the theory to accommodate changes).  Most associated with the writings of English-born US sociologist Michael Mann (b 1942), classicide (the construct being class + (hom)icide) describes the deliberate and systematic destruction, in whole or in part, of a social class through persecution and violence.  In that it may be compared to genocide (envisaged originally as the mass killing of defined ethnic or religious groups).  Between the two there can be overlap (such as in the Cambodian genocide by the Khmer Rouge regime in Democratic Kampuchea) but the emphasise in classicide is on the premeditated mass killing of a group based on their (perceived) social status; in that its similar to politicide (in which the targets are defined by their political activity) but in that case, the critical factor was what people do rather than what they are.  Very much at the heart of the French Revolution (1989), classicide was a feature of the “terrible twentieth century” and events able to be classified as such occurred in the Soviet Union under comrade Stalin (1878-1953; Soviet leader 1924-1953), during the Cultural Revolution (1966-1976) in the PRC (People's Republic of China) under comrade Chairman Mao Zedong (1893–1976; chairman of the Chinese Communist Party (CCP) & paramount leader of the PRC 1949-1976) and in Kampuchea under Pol Pot (Saloth Sâr; 1925–1998; dictator the communist (Maoist) state of Democratic Kampuchea (Cambodia) 1975-1979).  The related “social cleansing” (the removal of certain classes from certain places but (in theory) not involving mass killing) has the same relationship to classicide as ethnic cleansing has to genocide.

USS Defiant, the lead ship in the proposed Trump Class of guided missile cruisers to enter service in the 1930s.

The design has little in common with the historic battleships of the twentieth century but it's believed President Trump is drawn to the word "battleship" because they were the "biggest warships" he calls the Trump Class "battleships".  The future of surface fleets and their configurations is currently the subject of much discussion on the basis the likelihood of threats from massed swarms of autonomous or controlled UAVs (unmanned aerial vehicles (drones)) may render them too vulnerable to risk.  

With machines, “class” came to be used of a “type” or “run” of units of similar (though not necessarily identical) units.  The practice pre-dated mass-production of consumer goods (on the model Henry Ford’s Ford (1863-1947) Model T (1908-1927) made famous) and most influential was the UK’s Royal Navy that in the 1870s & 1880s standardized the use of “class” for designs of capital ships, the convention being the name adopted was the first laid down (and usually, though not always, launched).  By the time of the coming of the upsurge in warship construction that marked the naval “arms race” of the early twentieth century, naval architects in many nations had adopted the scheme of designation.  The “class” referred not to a ship’s “type” but the set of design parameters (dimensions, weight, firepower, propulsion etc) distinguishing the ships from others.  With the smaller warships (destroyers, light cruisers etc), there might be a dozen or more of the class while the big ships (battleships, battlecruisers etc) typically were built in batches of no more than four and the occasional class did consist of a single vessel.  Because it was an “arms race”, ships could be approaching obsolescence not long after being launched and succeeding classes incorporated new innovations and, in the case of the battleships: more of everything, the most famous example being the Royal Navy’s Dreadnought, the first “all big-gun” battleship that rendered obsolete every battleship then afloat (including all others in the British fleets).

HMS Temeraire at anchor, 1909.  She was one of three Bellerophon-class Dreadnought battleships built between 1906-1909, all of which survived World War I (1914-1918) and were scrapped in 1921-1922.

Before navies crystallised the system of “class” warships had tended to be described by “rate” or “type” (first-rate ship of the line, frigate, corvette, etc) but individual names were invoked, phrases such as “ships of the Iron Duke type” or “the Majestic battleships” being common in oral use and routine in Admiralty documents.  So the concept of “classes” had crept in before the system was formalized and, in the late 1800s, it was three factors that encouraged the shift: (1) Industrialised naval construction (steam power, iron and steel hulls and increasingly capable machine tools made designs expensive meaning a run of standardized units was a way to amortize the investment), (2) Serial production (with an arms race in progress, navies were ordering more warships and, as Henry Ford soon would demonstrate, batches of machines with identical (or near-identical) specifications could be produced faster and more cheaply than bespoke creations and (3) Navies were becoming more bureaucratic (as the fleets expanded, so did the establishment & dockyard facilities and, with ships becoming more complex and maintenance intensive, Admiralties needed precise accounting, training, logistics, and doctrinal categorisation.  “Class” already had a long history in engineering (especially in railway workshops) and taxonomy so was the natural administrative solution and at the time, Britain was the world’s leading naval power so, as went the Royal Navy, others followed.

Classes on four wheels

BMW promotional shot of 1964 BMW 1800 Neue Klasse.

The monument in the background is the Siegestor (Victory Gate), located on the on the boundary between the districts of Maxvorstadt & Schwabing in Munich, Bavaria Germany.  Completed in 1852, it was commissioned by Ludwig I (1786–1868; King of Bavaria 1825-1848) to honor the Bavarian army but after suffering severe damage in World War II (1939-1945), it only narrowly avoided demolition.  BMW stands for Bayerische Motoren Werke (Bavarian Motor Works) and the company has been based in Barvaria since formation in 1910.

As body types and other forms of differentiation proliferated in the twentieth century, cars were often sorted into “classes”, variously by manufacturers, dealers, registration authorities or reviewers.  The categories used from time to time numbered in the dozens but literal use of the word “class” has been rare in formal nomenclature although terms like “the 1.5 litre class” or “the family car class” were and remain common.  BMW’s Neue Klasse (1962-1970) became well-known outside Germany as the company’s first “mainstream” product on four wheels BMW and although always appearing in English as “New Class”, the literal translation of Neuse Klasse is “new cash register”; given the significance of the range in restoring the company to profitability (in 1960 it was a loss-making concern on the verge of being sold to avoid a declaration of bankruptcy) and ensuring its survival, the true meaning wholly is appropriate.  BMW’s Neue Klasse’s range was neither innovative or especially distinctive but was well-executed and the specification was perfect for the a point in the Wirtschaftswunder (the post-war “economic miracle” experienced by the FRG (Bundesrepublik Deutschland (Federal Republic of Germany; the old West Germany, 1949-1990))) at which a critical mass of the middle class had become sufficiently prosperous to trade in their Volkswagen Beetle for something “a class above”, just as a decade earlier they’d shifted from a motorcycle to one of the “microcars” built by BMW and others that had in the 1950s “put Germany back on wheels”.

BMW 1800 TI/SA, 1965 24 Hour Race, Circuit de Spa-Francorchamps, Francorchamps, Stavelot, Wallonia, Belgium.

The Neue Klasse tag was never used by BMW; the cars always given a designation based on engine displacement (1500; 1600; 1800; 2000) and the range was important also as the ancestor of the 3 Series, since 1975 the model that internationally has been the backbone of the company’s sales.  The model was noted too for it being the first time a “Hofmeister Kink” appeared on a BMW; although the motif had been seen for more than a decade in both Europe and the US, it became such a brand signature it came to be named after Wilhelm Hofmeister (1912–1978), BMW’s design chief 1955-1970.  Although in the 1960s the company never Neue Klasse part of its corporate language, so enduring did it become that in the 2020s it’s its latest generation of EVs (electric vehicle) is now officially the BMW Neue Klasse.  With Chinese manufacturing of EVs seemingly a juggernaut and thus facing troubles potentially as serious those the original Neue Klasse surmounted, the Bavarians hope history repeats itself.

Mercedes-Benz W116, the first S-Class: 1976 450 SEL 6.9.

Unlike BMW, Mercedes Benz did with the release of the W116 (1972-1980) sedans formalize use, the S Class (Sonderklasse, sometimes abbreviated as S-Klasse and translated as “Special Class”) the first instance of what would later became a convention (S Class, E Class, C Class etc).  The new name also encouraged retrospective use, the earlier “big” sedans (W111/112 (1959-1968) & W108/109 (1965-1972)) also sometimes referred to thus although this was never adopted by the factory.  A landmark achievement in its time, the original S-Class was the first recognizably "modern" Mercedes-Benz sedan and its design elements would be carried forward for two decades.

Mercedes-Benz advertising.  Although never explicitly labelling previous models as "S-Class", the factory does like to to hint and frankly, by 2026, the past was looking better than the future.

Despite that, Mercedes-Benz has in S-Class advertising (the model now in its seventh generation, the W223 introduced in 2020) often shown an array of previous generations of its “big” sedans including models like the W111/112 & W108/109 which, in period, never carried the designation and even the 600 (W100, 1963-1981), a model in the Grosser rather than S-Class lineage.  Although as early as 1968, a distinct range of smaller sedans had augmented the W108/109, (the range expanded further in 1983 by an even more compact model), the now familiar nomenclature (C Class, E Class, S Class) wasn’t standardized until 1993 when the alphanumeric names were inverted (500E becoming E500 etc), a change necessitated by the proliferation of models rendering the old system (dating from the 1920s) so prone to ambiguity it has become unmanageable.

Newspapers, advertisers and readers

Before the internet did what it did, for centuries it was print publications (newspapers, magazines and other periodicals) that were the prime vector for the distribution of news, information and entertainment; film, radio and television all had their effects (television notably contributing to the extinction of most afternoon newspapers) but generally, much of the established print media and what was then the “new media” managed a form of peaceful co-existence that was sometimes synergistic, newspaper proprietors and editors quickly expanding their coverage of what appeared on television because that was what their readers wanted, some buying the copies for no other reason.  In those jurisdictions that allowed the same corporation to publish newspapers and operate television stations in the same market, the techniques of cross-promotion became highly refined.

Unlike many mass-produced products, selling more newspapers did not necessarily increase profits; it was a matter of what class of readers were attracted.

Newspapers and magazines were historically unusual because the cover (or even subscription) price charged often would not be enough to pay for the paper alone, let alone the overall cost of production & distribution.  What covered the costs and provided centuries of sometimes vast profits was advertising revenue and although readers tended to think of themselves as buying “a product”, in reality they were the product being delivered to advertisers, exactly the same strategy that works so well for Facebook, TikTok etc.  However, an additional layer of complexity for the print media was that unlike a manufacturer of widgets, increasing sales did not always translate to greater profits.  It’s true the accountants at the widget factory also had to calculate if the extent of additional demand made worthwhile an investment in increased production (ie a night shift, an additional production line or factory etc) but one simplicity was that every dollar paid by a widget buyer (rich or poor) translated on the balance sheet in the same way.  What made print titles unusual was not all buyers were created equal and while the dollars paid by poor people for their newspapers were banked in the same way and had the same nominal value, they weren’t of necessity “worth having” because selling newspapers to the poor (ie of a lower socio-economic class) could be counter-productive for the business model (ie the more you sold to them, the greater the loss).

In the West, mainstream newspapers by the mid twentieth century had become polarized, the “popular” (ie tabloid) titles at one end and the “quality” press (ie broadsheet) at the other.  Because commercial success depended on being able to deliver to advertisers the “right” readers, an industry of market research emerged to perfect the analysis of working out which titles delivered the “right audience at the lowest cost”.  This research was both quantitative & qualitative because it mattered much to advertising agencies whether a title’s buyer lived in the south east, owned two cars, played golf on Saturdays and took an annual overseas holiday or lived in the north, took the bus to a football match on Saturdays and never left the country.  In many ways, they were separate populations and while both demographics might be attractive to those wishing to advertise products, in many cases they’d be different products and in some, exclusive to each.  By combining this data with advertising rates, agencies were able to work out for their clients which media (print, radio, television etc) could deliver the desired market segment at the cheapest rates.  In the case of national newspapers, the segmentation that mattered most was social class and what evolved in the UK was a metric to handle these calculations.  Developed by the industry collective, JICNARS (Joint Industry Committee for National Readership Surveys, a body owned jointly by publishers, advertisers & agencies), because the occupation of a household’s main breadwinner (chief earner) largely determined the spending pattern of that household, social class was determined primarily the their jobs and for this purpose there were six classes:

Class A: The upper middle class (by the mid 1970s in the UK around 20% of all households) with the chief earner (head of the household) typically a successful businessman, professional (lawyer, doctor, chartered accountant etc) or senior civil servant, living in a large detached house or high-priced apartment.  At the time, that class included headmasters of large public (ie private) schools, executives near board level in large companies, leading figures in local government, newspaper editors, senior journalists, professors and Church of England bishops.  As that list indicates, by the 2020s, the composition of Class A shifted a bet.  For the JICNARS’s purposes, the “upper class” (the so-called “1%”) were included in Class A.

Class B: The middle class, then some 10% of households.  These were often people holding “senior” positions who were financially stable and living lives of “quiet respectability” and although with neither the incomes or accumulated wealth (or, not infrequently, debt) of the Class A members, the significance was that in manners and cultural matters, their tastes and habits often overlapped, meaning their attention was sought by the same advertisers.  The Class B membership included vicars, headmasters of smaller schools, senior executive officers in the civil service, university lecturers, matrons of smaller hospitals, pharmacists, directors of smaller companies and qualified librarians in charge of smaller libraries.

Class C1: Just over 15% of households, the C1 families were the lower middle class, trades-people (employed or self-employed) and non-manual workers, “white-collar” workers such as articled clerks, owners of small businesses, clerks, typists, telephonists, curates and nurses.  A recent trend has been a marginalisation of the white collar component of the C1s by a number of factors, most obviously technology although this is spreading upwards to B and even A more than downwards.  Of the trades, despite recent rises in their economic value to advertisers, they’re considered culturally static so while their purchasing power has increased, they don’t identify with AB tastes.

Class C2: Intriguingly, many of those in Class C2 (about a quarter of households) enjoyed higher incomes than many in the C1 cohort and this was because, as the skilled working class, their economic value was higher because they contributed directly (and measurably) to productivity in a way an accountant’s clerk did not.  The C2 membership included foremen, fitters, knitters, plumbers, shop assistants with supervisory responsibilities, pastry-cooks and prison officers.

Class D: Although it probably wasn’t true statistically, for the purposes of the JICNARS, those is Class D were considered all manual workers, semi-skilled or unskilled; that didn’t mean the latter had no skills, it meant to an economist those skills could be quickly learned and required no formal education or structured training.  Some 20% of households were in Class D and typical employment profiles would include labourers, fishermen, bus conductors, traffic wardens and window cleaners.

Class E: Some 10% of households, the Es operated at the “lowest level of subsistence” and survived through precarious, low-paid employment, petty crime and transfer payments; they would now be classed as “welfare-dependent”.  Although the membership was diverse, the JICNARS for illustrative purposes listed migrants, those with substance abuse issues, families of old age pensioners, widows and those dependent on social security.

Predictably, the 30%-odd of the population in Class A & Class B tended to buy the “quality” papers, titles like the Financial Times, The Times, The Daily Telegraph and The Guardian collectively drawing almost half their readership from the ABs, this declining to around 40% for the Sunday editions.  What this affluent readership did was attract high-priced advertising, enabling the titles to remain profitable despite a low cover price and circulations that were tiny compared with the mass-market tabloids.  Of note too is that it was these publications (along with The Economist (a newspaper that looks like a glossy magazine) that were most read by decision makers in government and industry.  So, it was the quality newspapers that tended to provide informed discussion on public issues, political affairs, business and the arts; although the record of their influence on public policy was patchy, what they tended to do was “set the agenda”, another attraction for advertisers.

What made the pre-internet newspaper business unusual was that there was sometimes a conscious attempt to reduce sales, a discussion usually not heard in boardrooms or among members of management committees.  In 1968, The Times had embarked on a major promotional drive and, using conventional techniques, sales indeed did spike and that was most pleasing until the research revealed some 60% of its readers were now in the undesirable C1, C2, D & E classes, something the advertising agencies to quick to notice.  Accordingly, the paper’s editorial direction shifted back, ensuring as many as possible of the intruders were shed and the bias towards the AB was restored.  Profitability was thus also improved because with each copy of The Times sold at a nominal loss (based on the cost of production & distribution), selling more made sense only if the rising readership attracted more high-value advertising.  With the less desired classes forming a majority of the leadership, not only were the traditional advertisers less attracted, those seeking to reach the C1, C2 and D classes (few except tobacco companies and their ilk chased the E class) were not willing to pay the high-rates charged by the Times.  The Times did not repeat the mistake and that different news appeared in different papers to attract different audiences was hardly surprising for as Evelyn Waugh (1903-1966) put it in Scoop (1938): “They all have different policies, so of course they have to give different news.”

Nye Bevan and his wife Jennie Lee (1904–1988), London, 1934.

Waugh’s point of course can be considered as a matter of both cause and effect because whatever might happen on a publications profit & loss statement, there are also political consequences.  Until scared off, more than one government in the post-war years proposed increasing public expenditure in a way that would increase the burden only on taxpayers earning 2-3 times the national average and, without exception, these have been criticized by the “quality” press, usually on the basis not of such a fiscal package being “unfair” but that it would “alienate the political centre”.  As the JICNARS understood, in electoral terms, this was highly improbable because only about 10-12% of the population would lose out in such a redistribution but that sliver of the electorate was in the AB Class at the centre of the quality press’s readership and this dictated the response.  In his book In Place of Fear (1952), the Welsh Labour Party politician Aneurin "Nye" Bevan (1897–1960) pondered: “How can wealth persuade poverty to use its political freedom to keep wealth in power? Here lies the whole art of Conservative politics in the twentieth century.”  As political parties came to understand, it was possible to convince the poor to vote against their own economic interests if the “culture wars” dangled before their eyes could be made to seem enough of a threat, thus the weaponization in the US of guns, God, pickup trucks, trans rights, abortion, gay marriage and much else.

Epoch

Epoch (pronounced ep-uhk or ee-pok)

(1) A particular period of time marked by distinctive features, events etc.

(2) The beginning of a distinctive period in the history of anything.

(3) A point in time distinguished by a particular event or state of affairs; a memorable date.

(4) In geology, any of several divisions of a geologic period during which a geologic series is formed (much associated with rock formation).  An epoch (the shortest division of geologic time) is a sub-division of a period.  As a geochronologic unit, an epoch can range between hundreds of thousands to millions of years.

(5) In astronomy, an arbitrarily fixed instant of time or date, usually the beginning of a century or half century, used as a reference in giving the elements (such as coordinates of a planetary orbit) relating to a celestial body.

(6) In astronomy, the mean longitude of a planet as seen from the sun at such an instant or date.

(7) In chronology, astronomy & computing, a specific instant in time, chosen as the point of reference or zero value of a system that involves identifying instants of time.

(8) In physics, the displacement from zero at zero time of a body undergoing simple harmonic motion (the displacement of an oscillating or vibrating body at zero time).

(9) In AI (artificial intelligence), one complete presentation of the training data set to an iterative machine learning algorithm.

1605-1615: From the Medieval Latin epocha, from the Ancient Greek ἐποχή (epokhḗ) (epochē) (a check, cessation, stop, pause, fixed time, epoch of a star (ie the point at which it seems to halt after reaching the highest, and more generally the place of a star (thus the extension of use to “a historical epoch”))), from ἐπέχω (epékhō, (to hold in, check), the construct being ἐπι- (epi-) (upon) + ἔχω (ékhō) (to have, hold), from the primitive Indo-European root segh- (to hold).  The early seventeenth century adoption in English of epocha was in the sense of “point marking the start of a new period in time” and it was used by scholars and theologians of momentous events in history (the crucifixion of Christ; the Visigoths gathering at the gates of Rome etc).  Less than a decade after epocha had entered the language, the transferred meaning “a period of time” was in use and it entered the jargon of geology in 1802 although the technology then did not permit precise measurements and exploration was then embryonic (what are now understood as dinosaur fossils not so classified until 1824) so most of the early estimates of geological epochs were inaccurate.

Confusingly, “epoch” can be used either to refer to a distinct and defined historic period (ie with an agreed beginning & end) or the event associated with the beginning of that period.  The latter concept is best understood in the adjectival forms “epoch-making” and “epochful”.  Subepoch is a technical term from geology, used as a geochronologic unit comprising one or more ages, being a period of generally agreed significance within an epoch.  The companion superepoch (two or more sequential epochs references as one for illustrative or didactic purposes is non-standard.  In statistical analysis, sub_epoch, base-epoch, super_epoch & primary_epoch exist as commands in aspects of database handling and manipulation, the link being the use of “datum” as epoch’s coordinate term in cartography and engineering.  The alternative form epocha was in use between the seventeenth & nineteenth centuries.  Epoch is a noun & verb, epochful, epocjless & epochal are adjectives and epochally is an adverb; the noun plural is epochs.

Bal du moulin de la Galette (Dance at Le Moulin de la Galette, 1876), oil on canvas by Pierre-Auguste Renoir (1841–1919), Musée d'Orsay, Paris

The Belle Époque (appearing in texts often as La Belle Époque with capitalization not always used) was a period in European history characterized by peace, progress, cultural refinement and artistic innovation; the term was an adoption of the French La Belle Époque (literally “the beautiful era” and best understood as “the golden age”).  Historians date the start of the Belle Époque from the end of the Franco-Prussian War (1970-1871) although, “on the ground” it likely wasn’t so clear-cut because the impositions of war reparations made the first few post-war years “difficult” in France so “mid-1870s” may be a better point of origin.  The Belle Époque lasted until the blast of World War I (1914-1918) destroyed the continent’s sense of optimism and ended an era characterized by what might now be call an “end of history” feeling that held things like wars, famines and plagues were in the past and the future would be one of progress and improvement.

Art Nouveau.

An advertisement (1899) for Moët & Chandon's champagnes, designed by Czech painter & graphic artist Alphonse Mucha (1860–1939):  “White Star” champagne (left) & “Grand Crémant Imperial” (right).  The product is very much a period piece, Art Nouveau characterized by swirling shapes, stylized representations of women and intricate floral motifs.  For those with enough disposable income, La Belle Époque must have been an amusing time to live.  The “modern industrial” sense later summoned by the straight, sharp and geometric lines of Art Deco was a deliberate rejection of Art Nouveau's intricate, hand-crafted aesthetic yet in Art Deco the influence of the earlier style often is apparent.  Although by the 1920s unfashionable and in the inter-war years casually dismissed by many critics and historians, Art Nouveau's popular appeal never went away.  While there was never really a “revival”, the style's motifs remained a staple of commercial graphic art and the various “nostalgia movements” before being “cherry picked” by pop art, psychedelia and postmodernists.   

Those 40-odd years of what came to be called La Belle Époque were not without conflict or economic disruptions and it must be remembered Europe’s “golden age” was one of untroubled pleasure only for a select few, most of the population living lives of hard labor and drudgery, many on a variation of the Hobbesian (the very clever and deliciously wicked English philosopher Thomas Hobbes (1588-1679)) path: “nasty, crowded, brutish and short”.  La Belle Époque is a selective construct of the era’s intellectual and aesthetic landmarks in art, literature and architecture, characterized by opulence, eclecticism and an undeniable dynamism from which emerged movements such as Futurism, Cubism and Art Nouveau.  Viewed from our troubled times, the Belle Époque exists in a warm nostalgic glow and it’s telling the term first gained popularity in France during the 1930s, the decade of the Great Depression.  Even then, La Belle Époque was still in living memory but because it became mythologised as a “golden age”, it was as myth it passed into history.

Lindsay Lohan entering her fifth decade.  Her five eras thus far may loosely be labelled: (1) child star, (2) troubled Hollywood starlet, (3) nemesis, (4) reinvention and (5) redemption.

Signed to the Ford agency, Lindsay Lohan secured her first modelling gig aged three but what’s understood as the “Lindsay Lohan era” ran for the decade after the release of Mean Girls (2004).  It was characterized by her low-speed car crashes, court appearances and becoming a staple of the tabloid press and lower reaches of the glossy magazine industry, a reasonable contribution to GDP (gross domestic product), providing predictable cash flow for paparazzi on both sides of the Atlantic.  Improbable as it once seemed, she proved a survivor in the churn of the industry's destructive “child star” machine and on 2 July, 2026 celebrated her 40^th birthday.  That happened during the 23^rd FIFA (Fédération Internationale de Football Association (the International Federation of Association Football which, for historic reasons, recognizes more countries than the UN (United Nations)) World Cup and, on the day, playing at the Bay Area Stadium in Santa Clara, San Francisco, USA beat Bosnia-Herzegovina 2-0 so that was a good birthday present.  

Geologyin's illustration of the concept of geological epochs.

In scientific usage there is precision, the ICS (International Commission on Stratigraphy) codifying a strict hierarchy on the discipline of geology, the structure being Eon → Era → Period → Epoch → Age.  However, in ordinary English discourse (and even in the work of professional scholars and historians) there is no fixed hierarchy in that an age may be longer than an era and an era may be longer than an epoch; unless following established conventions, writers can opt for whichever word best conveys the intended nuance, a choice that can be influenced by the search for rhetorical effect or the rhythm of the narrative.  So, in the way of English, there are no “rules” but, as a general principle, (1) Age = “known for...”, (2) Era = “lasting period of...” and (3) Epoch = “a period with a turning point that defined its nature.”  The overlaps in use don’t usually cause confusion but among the fastidious there are acknowledged nuances and accepted conventions of use:

(1) An epoch is a distinct period marked by particular characteristics or events, thus the use in geology where defining changes or sets of conditions can be established by scientific techniques such as chemical analysis or radiocarbon dating.  In non-scientific use, because of the etymological lineage, an epoch typically begins with some sort of event thought a turning point or watershed and this can be an organic development with no exact fixed date (the Industrial Revolution) or something decidedly exact (the epoch of the computer operating system Unix is defined as 00:00:00 UTC, 1 January 1970 although this was not first set precisely then).

(2) An age is a period with a specific, dominant association.  That might be a technology (bronze age; oil age; jet age etc), a characteristic (age of empires; age of European colonialism etc) or an individual (Napoleonic age; Elizabethan Age etc).  Unlike the epochs of geologists and astronomers, “ages” can run in parallel or overlap.  While some are sequential such as the “Three Age System” (Stone Age; Bronze Age; Iron Age) tracking the evolution of humanity's tools and metalworking capabilities between prehistory and Antiquity, others can co-exist such as the Age of Sail & Age of Enlightenment.  Because of the nature of the word and historic pattern of use, of the three, “age” is the most flexible and adaptable because it’s merely associative, not exclusive and often with no precise chronology.

(3) An era is a period (by human standards usually but not necessarily long) with origins at a certain point (usually an event) and characterized by an enduring pattern; eras tend to be major historical phases or systems (the Nazi era; the analogue era etc).  Generally “era” is used to denote something coherent (though it need not be long); a stretch of history with a recognizable character, a beginning and an end.  That can reference the life of an individual (Queen Victoria lent her name to the “Victorian era” 1837-1901), several individuals (there were four Kings of England named George whose collective reign defined the “Georgian era” 1714-1830) or a specific closed-time set (the “inter war era”: 1918-1939).

Eras tour merchandise.  Canvas tapestry featuring photographs from Taylor Swift’s The Eras Tour, cotton canvas, 800 mm (31½ inches) x 1220 mm (48 inches).

Taylor Swift’s “Eras” project tends to be thought of as a concert tour but it’s better imagined as pop culture’s greatest ever exercise in vertical integration, a merging of music (audio streaming, packaged (in multiples in the case of the vinyl releases) & live performance), video content, merchandise ranging from framed posters, a “limited edition” book, a film with concert footage, outfits emulating those worn on stage, jewellery, hoodies, pillows, stainless steel tumblers and more.  Although there has in recent years been a bit of mission creep, the idea of a canvas tapestry as a piece of tour merchandise in the pop music business would, until recently, likely have occurred to few.  Commerce has moved on from a half-century earlier when, at a Led Zeppelin concert, one might be able to buy a Tee-shirt (in S, M, L & XL), maybe with a choice of black or white (black quickly selling out).

Ms Swift is good with words and for the “Eras” project may have pondered using “Ages” or “Epochs”.  Given the accepted conventions (Age = “known for...”, Era = “lasting period of...” and Epoch = “a period with a turning point that defined its nature.”) and the concept of the “Eras” project, a convincing case could have been made for “Ages” because each subset was thematically distinct while the use of “Epochs” would have worked because the word is understood as a “period of time with a beginning and end” but linking each with a single “triggering event” might have descended to abstractions so “Eras” seems the best choice.  Certainly it’s unlikely she long considered using “Periods”; although etymologically defensible, it would have been decarded on much the same basis as that of the publishers of the magazine Australian Women’s Weekly who, upon in 1983 switching to issuing monthly editions, opted not to change the title to “Women’s Monthly”.

There is of course a vagueness associated with the definitions because not all “eras” and “ages” have as convenient bookends the end of one war and the start of another; that’s why context can matter.  In speaking of the time after World War II (1939-1945), “post-war era” is a common term but the meaning can vary depending on what’s being discussed.  It’d be absurd to speak of 2026 as being in the “post-war” era (although in a sense that’s true) so meaning must be gleaned from context.  The two decade period 1918-1939 came to be called both the “inter-war” and “pre-war” era (although many tend to restrict the latter to a start-point in the mid-1930s) and in much historiography there's sometimes the suggestion the “post-war” era can usefully be said to have ended some 20 years hence; that’s about 1965 so conveniently (1) in the new era of the High Cold War, (2) about the length of a then typical “generation” and (3) in the 1960s, a very different era.  So it can be inexact and some with a focus on political economy fix the end date on exactly 17 October 1973, the day OAPEC (Organization of Arab Petroleum Exporting Countries) proclaimed an oil embargo targeting the US and other states providing military aid to Israel during the 1973 Yom Kippur War.  At that point, the West’s long post-war boom, although already stuttering, ended.  In a similar vein, although also very much a Western-centric view, some historians have argued the nineteenth century is best imagined as a construct running from the close of the Congress of Vienna (1814-1815) to the outbreak of World War I (1914-1918).  There’s much support for that although there are different views about the conceptual view of the twentieth century. While 1914 seems a logical starting-point, candidates for the end date include 1989 (fall of the Berlin Wall (1961-1989)), 1991 (dissolution of the Soviet Union (1922-1911)) and the 9/11 terrorist strikes in 2001.

Taylor Swift Style: Fashion through the eras.

Between March 2023 and December 2024, Taylor Swift’s “Eras” tour took in 149 shows in 51 cities over five continents; each performance ran for a remarkable 3½ hours and there was a mid-tour revision of the song set to interpolate material The Tortured Poets Department (2024), her eleventh studio album.  The “Eras” title was an allusion to the show’s format, a retrospective in which each of her albums was designated as a “musical era”, the many outfits worn tied to those themes and just as each song and each performance was a product, so could be each outfit, some available on-line for purchase by devoted Swifties.  So, as set piece events go, Ms Swift set a high bar and, on revenues in excess of US$2 billion, profits were high and continue to grow.

Even when there are precise start and end dates, things can at the margin become blurred.  Pedants enjoy pointing out the 1960s began on 1 January 1961 so an expression like “the 1960s” ends on 31 December 1969 but the decade in which most of those years existed actually includes 1970, a quirk which extends also to centuries and millennia, something ultimately a product of there being no year zero in the calendar now defining BCE (before Common Era) and CE (Common Era) (the pair the secular version of BC (Before Christ) and AD (from the Latin Anno Domini (in the year of the Lord)), all based on the (nominal) birth date of Jesus Christ.  “Ages” and “eras” can at once be “exact” and “indicative”.  Many of the civilizations of antiquity all had their so-called “golden ages” and these tended to be associated with particular dynasties or reigns.  The examples are many and are cross-cultural, including the Gupta Empire in India (mid-third to mid-sixth century AD) founded by Mahārāja Śrī-Gupta, the Tang dynasty (626-684) & the reign of Tae-tsong (618-626) in China and, in Egypt, the reigns of Sethos I and Ram'eses II (1336-1224 BC).  In the West, the use of “golden ages” is legion including in Russia during the rule of Czar Peter the Great (1672-1725) (memorable because the Russian people have not enjoyed many “golden ages”) and, of course, in England, the “Elizabethan age”, referencing the reign of Elizabeth I (1533–1603; Queen of England & Ireland 1558-1603).  However, at the granular level, the idea of the term “Elizabethan age” denoting a “golden age” in literature was contested by the English writer, literary scholar and Anglican lay theologian C. S. Lewis (1898–1963) who, in his Introduction to English Literature in the Sixteenth Century (1654), distinguished the “estimable” literature of the later Elizabethan period from what he called that of the earlier “drab age”.  Lewis found drabness in the poetry and prose of the later medieval period up to the early Renaissance, distinguishing it from the “golden era style” between circa 1580-1603.  Lewis was an uncompromising critic but while most in the profession may well agree much that was written in the fifteenth century and early Tudor period was “drab”, among those published in the period were Sir Thomas Wyatt (1503-1542) and John Skelton (circa 1460-1529); their writing was not beyond criticism but the works were hardly drab.

Sarah Chapelle's (b 1992) Swiftie site documenting looks from The Eras tour: Fearless v6 (worn 18 October, 2024, far left), Midnights v5 (worn 16 August, 2024, centre left), 1989 v2 (worn 19 March, 2023, centre right) and Reputation v1 (worn 18 March, 2023, far right).  Some outfits can be purchased on-line but buyers should note they should not expect their appearance exactly to emulate what's “on the tin”.  

Simulacrum describes an image that while not purely realistic, maintains enough of a likeness for the subject to be recognizable.  In some jurisdictions it can be deemed “deceptive and misleading” if a product is represented in manner judged to be a “deliberate misrepresentation” intended to induce a purchase.  Legal recourse is available but is practical only if enough money is involved (such as real estate); although in theory someone purchasing a McDonalds Big Mac after being tempted by the image in the advertising might have grounds for an action, a claim of under $US10 would not impress a judge and even a class action would, on several grounds, be thrown out.  Presumably a disgruntled consumer could lodge a claim for the “pain & suffering” caused by one's Big Mac not looking as attractive as the one in the advertising but that'd likely anger the judge still more.  The classic simulacrums were the stylish images rendered in the 1960s by Art Fitzpatrick (1919–2015) & Van Kaufman (1918-1995) for GM’s (General Motors) PMD (Pontiac Motor Division) and those of Ms Swift in the Eras Tour outfits are in the same “mannerist but not quite surrealist” tradition.  Although obviously “unrealistic”, these depictions are not “deceptive and misleading” because they’re so obviously simulacral and exist only as devices, the extent of the licence taken illustrated by them appearing next to a flesh & blood Ms Swift in the same outfit.  They are “impossible” rather than “idealized”.

Super simulacrum: The Colossus of Rhodes (circa 1560), hand-colored by Dutch portrait and religious painter Maarten van Heemskerck (1498–1574) on an engraving by Dutch publisher & designer Philip Galle (1537–1612).

The Colossus of Rhodes was one of the Seven Wonders of the Ancient World and although it stood for barely half a century before being felled by an earthquake, it's ruins lying for almost a millennium as a kind of tourist attraction before the metal was carted of as scrap to be melted-down an re-cycled.  The notion the statue's legs straddled the entrance to Rhodes Harbor with tall-masted ships passing between them was wholly fanciful; even with modern materials and techniques, such a construction would be impossible.  The engineers and architects of the sixteenth century would of course have known it couldn't be done but such was the allure of the era of Classical Antiquity that brilliant myths seduced the public imagination better than tiresome facts.

Other “era-related” terminology also often used interchangeably relates to that long span of history between the fall of the Western Roman Empire (476 AD) and the dawn of the Renaissance in the late fourteenth century: (1) Middle Ages, (2) Dark Ages and (3) Medieval.  “Middle Ages” is the most obviously descriptive because it refers to the period between the dying gasps of Classical Antiquity and the cultural & artistic revival of the Renaissance while Medieval simply means “relating to the Middle Ages” (although by virtue of association and use, it came to be used also as a slur).  As general principle, historians tend to divide the Middle Ages into (1) Early (476-circa 1000), (2) High (circa 1000-circa 1300) and (3) Late (circa 1300-circa 1500).  “Dark Ages” reflected the prejudices of fifteenth century writers who regarded the earlier Middle Ages (476-circa 1000) as a period of stagnation, lack of progress and “intellectual darkness”, a stark contrast to the idealized vision of Classical Antiquity they constructed from what evidence there was, “filling in the gaps” with imaginations as famously vivid as any of the Medieval scribes and artists responsible for some fabulous beasts.  The Seven Wonders of of the Ancient World” they found especially compelling, some of their speculative depictions of the Colossus of Rhodes and the Walls and Hanging Gardens of Babylon such examples of architectural gigantism even Albert Speer (1905–1981; Nazi court architect 1934-1942; Nazi minister of armaments and war production 1942-1945) might have been embarrassed.  Maybe they looked in awe at the scale of Great Pyramid of Giza and assumed all the ancients operated in “think big” mode.

Tony Abbott (b 1957; Prime Minister of Australia 2013-2015) agitprop.

Mr Abbott's combination of relentless negativity and repetition of 3WSs (three word slogans) contributed to his resounding victory in the 2013 general election although, in office, the results were mixed and it ended badly.  Recently revived as the Liberal Party's federal president (the institution's third “Lazerus with a triple bypass” after Sir Robert Menzies (1894–1978; Prime Minister of Australia 1939-1941 & 1949-1966) and John Howard (b 1939; Prime Minister of Australia 1996-2007)), Mr Abbott unquestionably was one of history's most effective leaders of the opposition but as Roy Jenkins (1920–2003) remarked of Lord Randolph Churchill (1849–1895):  “He was essentially a opposition politician and behaved as such even when in government”.  Of such matters, Jenkins was a fair judge.  Although medieval may literally mean “relating to the Middle Ages” and can be used as a neutral adjective (medieval architecture, medieval manuscripts etc), it is also used as a term of derision: “Mr Abbott’s views on certain topics seem distinctly medieval although, to be fair, the thirteenth century probably never produced a finer mind”.  Used in that way, it implies “outdated, harsh or unenlightened”, a throwback to the stereotypes of the Dark Ages but more recent scholarship has cast doubt on whether the “Dark Ages” was a time as culturally sterile and technologically stagnant and was for centuries an orthodoxy among historians.  A view now more popular is the earlier conceptions of the period were formed because of the relative scarcity of written records and although it’s now clear there was progress in agriculture, law, architecture, theology, literature, engineering and state formation, it is true that compared with what came before and what followed, progress often was fitful.  Of note also is there were in the Renaissance and beyond not a few who didn’t count “advances in theology” as progress worth mentioning.