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LATENT REFERENCES / TAG1

McLuhan’s Tetrad

This reference note belongs to Tag1 in Latent References, an archive curated by Keigo Yoshida. Its archive region is Media art timeline. The note preserves its source text and links so that readers can trace the material behind the 3D map.

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Tag1
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Media art timeline

Archived reference note

English translation of the archived note. JP shows the original text. Source links and literal code are retained; the translation does not update or independently verify the source claims.

is a framework for analyzing and predicting media’s (technology’s) effects on society and humans from 4 aspects. Effects arising when introducing technologies or artifacts are organized through the following 4 questions. Enhancement: What does it expand, enhance, or accelerate? (Example: Cars extend and enhance the function of feet.) Obsolescence: What does it render outdated and cause to decline? (Example: Cars cause walking and horse-drawn carriages to decline.) Retrieval: what from the past does it recover or revive? (Example: the car retrieves the lost freedom of individual movement.) Reversal: when pushed to its limit, what does it reverse into? (Example: excesses of a car-based society, such as traffic congestion, deprive people of freedom of movement and reverse into a state “slower than walking.”) These 4 elements do not oppose one another but function as “laws of media” acting simultaneously on one another. Details are explained at length in McLuhan’s book “Laws of Media.” #list

Source updated 2026-09-11 · Snapshot 2026-10-08

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