''Understanding Media: The Extensions of Man'' is a 1964 book by
Marshall McLuhan
Herbert Marshall McLuhan (, ; July 21, 1911 – December 31, 1980) was a Canadian philosopher whose work is among the cornerstones of the study of media studies, media theory. Raised in Winnipeg, McLuhan studied at the University of Manitoba a ...
, in which the author proposes that the
media
Media may refer to:
Communication
* Means of communication, tools and channels used to deliver information or data
** Advertising media, various media, content, buying and placement for advertising
** Interactive media, media that is inter ...
, not the content that they carry, should be the focus of study. He suggests that the
medium affects the society in which it plays a role mainly by the characteristics of the medium rather than the content. The book is considered a pioneering study in media theory.
McLuhan pointed to the
light bulb as an example. A light bulb does not have content in the way that a newspaper has articles or a television has programs, yet it is a medium that has a social effect; that is, a light bulb enables people to create spaces during nighttime that would otherwise be enveloped by darkness. He describes the light bulb as a medium without any content. McLuhan states that "a light bulb creates an environment by its mere presence".
More controversially, he postulated that content had little effect on society—in other words, it did not matter if television broadcasts children's shows or violent programming. He noted that all media have characteristics that engage the viewer in different ways; for instance, a passage in a book could be reread at will, but a movie had to be screened again in its entirety to study any individual part of it.
The book is the source of the well-known phrase "
the medium is the message
"The medium is the message" is a phrase coined by the Canadian communication theorist Marshall McLuhan and the name of the first chapter in his ''Understanding Media: The Extensions of Man'', published in 1964.Originally published in 1964 by Ment ...
". It was a leading indicator of the upheaval of local
culture
Culture ( ) is a concept that encompasses the social behavior, institutions, and Social norm, norms found in human societies, as well as the knowledge, beliefs, arts, laws, Social norm, customs, capabilities, Attitude (psychology), attitudes ...
s by increasingly
globalized values
In ethics and social sciences, value denotes the degree of importance of some thing or action, with the aim of determining which actions are best to do or what way is best to live ( normative ethics), or to describe the significance of different a ...
. The book greatly influenced academics, writers, and social theorists. The book discussed the radical analysis of social change, how society is shaped, and reflected by communications media.
Summary
Throughout ''Understanding Media'', McLuhan uses historical quotes and
anecdotes to probe the ways in which new forms of media change the perceptions of societies, with specific focus on the ''effects'' of each medium as opposed to the content that is transmitted by each medium. McLuhan identified two types of media: "hot" media and "cool" media, drawing from French anthropologist
Lévi-Strauss's distinction between hot and cold societies.
[Claude Lévi-Strauss (1962) '']The Savage Mind
''The Savage Mind'' (), also translated as ''Wild Thought'', is a 1962 work of structural anthropology by the anthropologist Claude Lévi-Strauss.
Summary
"The Savage Mind"
Lévi-Strauss makes clear that "''la pensée sauvage''" refers not ...
'', ch.8[Taunton, Matthew (2019) ]
Red Britain: The Russian Revolution in Mid-Century Culture
', p.223
This terminology does not refer to the temperature or emotional intensity, nor some kind of classification, but to the degree of participation. Cool media are those that require high participation from users, due to their low definition (the receiver/user must fill in missing information). Since many senses may be used, they foster involvement. Conversely, hot media are low in audience participation due to their high resolution or definition. Film, for example, is defined as a hot medium, since in the context of a dark movie theater, the viewer is completely captivated, and one primary sense—visual—is filled in high definition. In contrast, television is a cool medium, since many other things may be going on and the viewer has to integrate all of the sounds and sights in the context.
In Part One, McLuhan discusses the differences between
hot and cool media and the ways that one medium translates the content of another medium. Briefly, "the content of a medium is always another medium".
In Part Two, McLuhan analyzes each medium (circa 1964) in a manner that exposes the form, rather than the content of each medium. In order, McLuhan covers:
* The
Spoken Word;
* The
Written Word (i.e.,
manuscript
A manuscript (abbreviated MS for singular and MSS for plural) was, traditionally, any document written by hand or typewritten, as opposed to mechanically printed or reproduced in some indirect or automated way. More recently, the term has ...
or
incunabulum);
*
Road
A road is a thoroughfare used primarily for movement of traffic. Roads differ from streets, whose primary use is local access. They also differ from stroads, which combine the features of streets and roads. Most modern roads are paved.
Th ...
s and Paper Routes;
*
Number
A number is a mathematical object used to count, measure, and label. The most basic examples are the natural numbers 1, 2, 3, 4, and so forth. Numbers can be represented in language with number words. More universally, individual numbers can ...
s;
*
Clothing
Clothing (also known as clothes, garments, dress, apparel, or attire) is any item worn on a human human body, body. Typically, clothing is made of fabrics or textiles, but over time it has included garments made from animal skin and other thin s ...
;
*
Housing
Housing refers to a property containing one or more Shelter (building), shelter as a living space. Housing spaces are inhabited either by individuals or a collective group of people. Housing is also referred to as a human need and right to ...
;
*
Money
Money is any item or verifiable record that is generally accepted as payment for goods and services and repayment of debts, such as taxes, in a particular country or socio-economic context. The primary functions which distinguish money are: m ...
;
*
Clock
A clock or chronometer is a device that measures and displays time. The clock is one of the oldest Invention, human inventions, meeting the need to measure intervals of time shorter than the natural units such as the day, the lunar month, a ...
s;
* The
Print (i.e.,
pictorial lithograph
Lithography () is a planographic method of printing originally based on the miscibility, immiscibility of oil and water. The printing is from a stone (lithographic limestone) or a metal plate with a smooth surface. It was invented in 1796 by ...
or
woodcut);
*
Comics;
* The
Printed Word (i.e.,
typography
Typography is the art and technique of Typesetting, arranging type to make written language legibility, legible, readability, readable and beauty, appealing when displayed. The arrangement of type involves selecting typefaces, Point (typogra ...
);
* The
Wheel
A wheel is a rotating component (typically circular in shape) that is intended to turn on an axle Bearing (mechanical), bearing. The wheel is one of the key components of the wheel and axle which is one of the Simple machine, six simple machin ...
;
* The
Bicycle
A bicycle, also called a pedal cycle, bike, push-bike or cycle, is a human-powered transport, human-powered or motorized bicycle, motor-assisted, bicycle pedal, pedal-driven, single-track vehicle, with two bicycle wheel, wheels attached to a ...
and
Airplane
An airplane (American English), or aeroplane (Commonwealth English), informally plane, is a fixed-wing aircraft that is propelled forward by thrust from a jet engine, Propeller (aircraft), propeller, or rocket engine. Airplanes come in a vari ...
;
* The
Photograph
A photograph (also known as a photo, or more generically referred to as an ''image'' or ''picture'') is an image created by light falling on a photosensitivity, photosensitive surface, usually photographic film or an electronic image sensor. Th ...
;
* The
Press;
* The
Motorcar;
*
Ads;
*
Game
A game is a structured type of play usually undertaken for entertainment or fun, and sometimes used as an educational tool. Many games are also considered to be work (such as professional players of spectator sports or video games) or art ...
s;
* The
Telegraph
Telegraphy is the long-distance transmission of messages where the sender uses symbolic codes, known to the recipient, rather than a physical exchange of an object bearing the message. Thus flag semaphore is a method of telegraphy, whereas ...
;
* The
Typewriter
A typewriter is a Machine, mechanical or electromechanical machine for typing characters. Typically, a typewriter has an array of Button (control), keys, and each one causes a different single character to be produced on paper by striking an i ...
;
* The
Telephone
A telephone, colloquially referred to as a phone, is a telecommunications device that enables two or more users to conduct a conversation when they are too far apart to be easily heard directly. A telephone converts sound, typically and most ...
;
* The
Phonograph
A phonograph, later called a gramophone, and since the 1940s a record player, or more recently a turntable, is a device for the mechanical and analogue reproduction of sound. The sound vibration Waveform, waveforms are recorded as correspond ...
;
*
Movie
A film, also known as a movie or motion picture, is a work of visual art that simulates experiences and otherwise communicates ideas, stories, perceptions, emotions, or atmosphere through the use of moving images that are generally, sinc ...
s;
*
Radio
Radio is the technology of communicating using radio waves. Radio waves are electromagnetic waves of frequency between 3 hertz (Hz) and 300 gigahertz (GHz). They are generated by an electronic device called a transmitter connec ...
;
*
Television
Television (TV) is a telecommunication medium for transmitting moving images and sound. Additionally, the term can refer to a physical television set rather than the medium of transmission. Television is a mass medium for advertising, ...
;
*
Weapon
A weapon, arm, or armament is any implement or device that is used to deter, threaten, inflict physical damage, harm, or kill. Weapons are used to increase the efficacy and efficiency of activities such as hunting, crime (e.g., murder), law ...
s; and
*
Automation
Automation describes a wide range of technologies that reduce human intervention in processes, mainly by predetermining decision criteria, subprocess relationships, and related actions, as well as embodying those predeterminations in machine ...
.
Concept of "media"

McLuhan uses interchangeably the words ''medium'', ''media'', and ''technology''.
For McLuhan a ''medium'' is "any extension of ourselves" or, more broadly, "any new technology".
[p.7] Contrastly, in addition to forms such as
newspaper
A newspaper is a Periodical literature, periodical publication containing written News, information about current events and is often typed in black ink with a white or gray background. Newspapers can cover a wide variety of fields such as poli ...
s,
television
Television (TV) is a telecommunication medium for transmitting moving images and sound. Additionally, the term can refer to a physical television set rather than the medium of transmission. Television is a mass medium for advertising, ...
, and
radio
Radio is the technology of communicating using radio waves. Radio waves are electromagnetic waves of frequency between 3 hertz (Hz) and 300 gigahertz (GHz). They are generated by an electronic device called a transmitter connec ...
, McLuhan includes the
light bulb,
[pp.8-9] car
A car, or an automobile, is a motor vehicle with wheels. Most definitions of cars state that they run primarily on roads, seat one to eight people, have four wheels, and mainly transport people rather than cargo. There are around one billio ...
s,
speech
Speech is the use of the human voice as a medium for language. Spoken language combines vowel and consonant sounds to form units of meaning like words, which belong to a language's lexicon. There are many different intentional speech acts, suc ...
, and
language
Language is a structured system of communication that consists of grammar and vocabulary. It is the primary means by which humans convey meaning, both in spoken and signed language, signed forms, and may also be conveyed through writing syste ...
in his definition of ''media'': all of these, as technologies, mediate our communication; their forms or structures affect how we perceive and understand the world around us.
McLuhan says that conventional pronouncements fail in studying media because they focus on content, which blinds them to the psychic and social effects that define the medium's true significance. McLuhan observes that any medium "amplifies or accelerates existing processes", introducing a "change of scale or pace or shape or pattern into human association, affairs, and action", which results in "psychic, and social consequences".
This is the real "meaning or message" brought by a medium, a social and psychic message, and it depends solely on the medium itself, regardless of the 'content' emitted by it.
This is basically the meaning of "
the medium is the message
"The medium is the message" is a phrase coined by the Canadian communication theorist Marshall McLuhan and the name of the first chapter in his ''Understanding Media: The Extensions of Man'', published in 1964.Originally published in 1964 by Ment ...
".
To demonstrate the flaws of the common belief that the message resides in how the medium is used (the content), McLuhan provides the example of
mechanization
Mechanization (or mechanisation) is the process of changing from working largely or exclusively by hand or with animals to doing that work with machinery. In an early engineering text, a machine is defined as follows:
In every fields, mechan ...
, pointing out that regardless of the product (e.g.,
corn flakes
Corn flakes, or cornflakes, are a breakfast cereal made from toasting flakes of corn (maize). Originally invented as a Breakfast, breakfast food to counter indigestion, it has become a popular food item in the American cuisine, American diet and ...
or
Cadillac
Cadillac Motor Car Division, or simply Cadillac (), is the luxury vehicle division (business), division of the American automobile manufacturer General Motors (GM). Its major markets are the United States, Canada and China; Cadillac models are ...
s), the impact on workers and society is the same.
In a further exemplification of the common unawareness of the real meaning of media, McLuhan says that people "describe the scratch but not the itch".
[p.10] As an example of "media experts" who follow this fundamentally flawed approach, McLuhan quotes a statement from "General"
David Sarnoff
David Sarnoff (February 27, 1891 – December 12, 1971) was a Russian and American businessman who played an important role in the American history of radio and television. He led the Radio Corporation of America (RCA) for most of his career in ...
(head of
RCA), calling it the "voice of the current
somnambulism".
[p.11] Each medium "adds itself on to what we already are", realizing "amputations and extensions" to our senses and bodies, shaping them in a new technical form. As appealing as this remaking of ourselves may seem, it really puts us in a "narcissistic hypnosis" that prevents us from seeing the real nature of the media.
McLuhan also says that a characteristic of every medium is that its content is always another (previous) medium.
For an example in the new millennium, the
Internet
The Internet (or internet) is the Global network, global system of interconnected computer networks that uses the Internet protocol suite (TCP/IP) to communicate between networks and devices. It is a internetworking, network of networks ...
is a medium whose content is various media which came before it—the printing press, radio and the moving image.
An overlooked, constantly repeated understanding McLuhan has is that moral judgement (for better or worse) of an individual using media is very difficult, because of the psychic effects media have on society and their users. Moreover, media and technology, for McLuhan, are not necessarily inherently "good" or "bad" but bring about great change in a society's way of life. Awareness of the changes are what McLuhan seemed to consider most important, so that, in his estimation, the only sure disaster would be a society not perceiving a technology's effects on their world, especially the chasms and tensions between generations.
The only possible way to discern the real "principles and lines of force" of a medium (or structure) is to stand aside from it and be detached from it. This is necessary to avoid the powerful ability of any medium to put the unwary into a "subliminal state of Narcissus trance", imposing "its own assumptions, bias, and values" on him. Instead, while in a detached position, one can predict and control the effects of the medium. This is difficult because "the spell can occur immediately upon contact, as in the first bars of a melody".
[p.15] One historical example of such detachment is
Alexis de Tocqueville
Alexis Charles Henri Clérel, comte de Tocqueville (29 July 180516 April 1859), was a French Aristocracy (class), aristocrat, diplomat, political philosopher, and historian. He is best known for his works ''Democracy in America'' (appearing in t ...
and the medium of
typography
Typography is the art and technique of Typesetting, arranging type to make written language legibility, legible, readability, readable and beauty, appealing when displayed. The arrangement of type involves selecting typefaces, Point (typogra ...
. He was in such position because he was highly literate.
Instead, an historical example of the embrace of technological assumptions happened with the
Western world
The Western world, also known as the West, primarily refers to various nations and state (polity), states in Western Europe, Northern America, and Australasia; with some debate as to whether those in Eastern Europe and Latin America also const ...
, which, heavily influenced by
literacy
Literacy is the ability to read and write, while illiteracy refers to an inability to read and write. Some researchers suggest that the study of "literacy" as a concept can be divided into two periods: the period before 1950, when literacy was ...
, took its principles of "uniform and continuous and sequential" for the actual meaning of "rational".
McLuhan argues that media are ''languages'', with their own structures and systems of grammar, and that they can be studied as such. He believed that media have ''effects'' in that they continually shape and re-shape the ways in which individuals, societies, and cultures perceive and understand the world. In his view, the purpose of
media studies is to make visible what is invisible: the effects of media technologies themselves, rather than simply the messages they convey.
Media studies therefore, ideally, seeks to identify patterns within a medium and in its interactions with other media. Based on his studies in
New Criticism
New Criticism was a Formalism (literature), formalist movement in literary theory that dominated American literary criticism in the middle decades of the 20th century. It emphasized close reading, particularly of poetry, to discover how a work of l ...
, McLuhan argued that technologies are to words as the surrounding culture is to a poem: the former derive their meaning from the context formed by the latter. Like
Harold Innis, McLuhan looked to the broader culture and society within which a medium conveys its messages to identify patterns of the medium's effects.
"Hot" and "cool" media
In the first part of ''Understanding Media,'' McLuhan also states that different media invite different degrees of participation on the part of a person who chooses to consume a medium. Some media, such as film, were "hot" - that is, they enhance one single
sense
A sense is a biological system used by an organism for sensation, the process of gathering information about the surroundings through the detection of Stimulus (physiology), stimuli. Although, in some cultures, five human senses were traditio ...
, in this case
vision
Vision, Visions, or The Vision may refer to:
Perception Optical perception
* Visual perception, the sense of sight
* Visual system, the physical mechanism of eyesight
* Computer vision, a field dealing with how computers can be made to gain und ...
, in such a manner that a person does not need to exert much effort in filling in the details of a movie image. McLuhan contrasted this with "cool" TV, which he claimed requires more effort on the part of viewer to determine meaning, and
comics
a Media (communication), medium used to express ideas with images, often combined with text or other visual information. It typically the form of a sequence of Panel (comics), panels of images. Textual devices such as speech balloons, Glo ...
, which due to their minimal presentation of visual detail require a high degree of effort to fill in details that the cartoonist may have intended to portray. A movie is thus said by McLuhan to be "hot", intensifying one single sense "high definition", demanding a viewer's attention, and a comic book to be "cool" and "low definition", requiring much more conscious participation by the reader to extract value.
"Any hot medium allows of less participation than a cool one, as a lecture makes for less participation than a seminar, and a book for less than a dialogue."
Hot media usually, but not always, provide complete involvement without considerable stimulus. For example, print occupies visual space, uses visual senses, but can immerse its reader. Hot media favour analytical precision, quantitative analysis and sequential ordering, as they are usually sequential, linear and logical. They emphasize one sense (for example, of sight or sound) over the others. For this reason, hot media also include
radio
Radio is the technology of communicating using radio waves. Radio waves are electromagnetic waves of frequency between 3 hertz (Hz) and 300 gigahertz (GHz). They are generated by an electronic device called a transmitter connec ...
, as well as
film
A film, also known as a movie or motion picture, is a work of visual art that simulates experiences and otherwise communicates ideas, stories, perceptions, emotions, or atmosphere through the use of moving images that are generally, sinc ...
, the
lecture
A lecture (from ) is an oral presentation intended to present information or teach people about a particular subject, for example by a university or college teacher. Lectures are used to convey critical information, history, background, theo ...
and
photography
Photography is the visual arts, art, application, and practice of creating images by recording light, either electronically by means of an image sensor, or chemically by means of a light-sensitive material such as photographic film. It is empl ...
.
Cool media, on the other hand, are usually, but not always, those that provide little involvement with substantial stimulus. They require more active participation on the part of the user, including the perception of abstract patterning and simultaneous comprehension of all parts. Therefore, according to McLuhan cool media include
television
Television (TV) is a telecommunication medium for transmitting moving images and sound. Additionally, the term can refer to a physical television set rather than the medium of transmission. Television is a mass medium for advertising, ...
, as well as the
seminar
A seminar is a form of academic instruction, either at an academic institution or offered by a commercial or professional organization. It has the function of bringing together small groups for recurring meetings, focusing each time on some part ...
and
cartoons. McLuhan describes the term "cool media" as emerging from jazz and popular music and, in this context, is used to mean "detached".
Examples of media and their messages
Critiques of ''Understanding Media''
Some theorists have attacked McLuhan's definition and treatment of the word "medium" for being too simplistic.
Umberto Eco, for instance, contends that McLuhan's medium conflates channels, codes, and messages under the overarching term of the medium, confusing the vehicle, internal code, and content of a given message in his framework.
In ''Media Manifestos'',
Régis Debray also takes issue with McLuhan's envisioning of the medium. Like Eco, he too is ill at ease with this reductionist approach, summarizing its ramifications as follows:
The list of objections could be and has been lengthened indefinitely: confusing technology itself with its use of the media makes of the media an abstract, undifferentiated force and produces its image in an imaginary "public" for mass consumption; the magical naivete of supposed causalities turns the media into a catch-all and contagious "mana"; apocalyptic millenarianism invents the figure of a homo mass-mediaticus without ties to historical and social context, and so on.
Furthermore, when ''Wired'' interviewed him in 1995, Debray stated that he views McLuhan "more as a poet than a historian, a master of intellectual collage rather than a systematic analyst.... McLuhan overemphasizes the technology behind cultural change at the expense of the usage that the messages and codes make of that technology."
Dwight Macdonald, in turn, reproached McLuhan for his focus on television and for his "aphoristic" style of prose, which he believes left ''Understanding Media'' filled with "contradictions, non-sequiturs, facts that are distorted and facts that are not facts, exaggerations, and chronic rhetorical vagueness".
Additionally,
Brian Winston’s ''Misunderstanding Media'', published in 1986, chides McLuhan for what he sees as his
technologically deterministic stances.
Raymond Williams
Raymond Henry Williams (31 August 1921 – 26 January 1988) was a Welsh socialist writer, academic, novelist and critic influential within the New Left and in wider culture. His writings on politics, culture, the media and literature contribu ...
and
James W. Carey further this point of contention, claiming:
The work of McLuhan was a particular culmination of an aesthetic theory which became, negatively, a social theory ... It is an apparently sophisticated technological determinism which has the significant effect of indicating a social and cultural determinism ... If the medium - whether print or television – is the cause, of all other causes, all that men ordinarily see as history is at once reduced to effects. (Williams 1990, 126/7)
David Carr states that there has been a long line of "academics who have made a career out of deconstructing McLuhan’s effort to define the modern media ecosystem", whether it be due to what they see as McLuhan's ignorance toward socio-historical context or the style of his argument.
While some critics have taken issue with McLuhan's writing style and mode of argument, McLuhan himself urged readers to think of his work as "probes" or "mosaics" offering a toolkit approach to thinking about the media. His eclectic writing style has also been praised for its postmodern sensibilities and suitability for virtual space.
Exploring theories
McLuhan's theories about "the medium is the message" link culture and society. A recurrent topic is the contrast between
oral cultures and
print culture
Print culture embodies all forms of printed text and other printed forms of visual communication. One prominent scholar of print culture in Europe is Elizabeth Eisenstein, who contrasted the print culture of Europe in the centuries after the ad ...
.
Each new form of media, according to the analysis of McLuhan, shapes messages differently thereby requiring new filters to be engaged in the experience of viewing and listening to those messages.
McLuhan argues that as "sequence yields to the simultaneous, one is in the world of the structure and of configuration". The main example is the passage from mechanization (processes fragmented into sequences, lineal connections) to electric speed (faster up to simultaneity, creative configuration, structure, total field).
[p.13]
Howard Rheingold comments upon McLuhan's "the medium is the message" in relation to the convergence of technology, specifically the computer. In his book ''Tools for Thought'' Rheingold explains the notion of the universal machine - the original conception of the computer.
Eventually computers will no longer use information but knowledge to operate, in effect ''thinking''. If in the future computers (the medium) are everywhere, then what becomes of McLuhan's message?
Historical examples
According to McLuhan, the
French Revolution and
American Revolution
The American Revolution (1765–1783) was a colonial rebellion and war of independence in which the Thirteen Colonies broke from British America, British rule to form the United States of America. The revolution culminated in the American ...
happened under the push of
print whereas the preexistence of a strong oral culture in Britain prevented such an effect.
Footnotes
External links
* of Marshall McLuhan (author)
{{Marshall McLuhan
1964 non-fiction books
Books about the media
Books about hyperreality
Books in philosophy of technology
Canadian essays
English-language non-fiction books
Works by Marshall McLuhan
Books about media theory