Where the nervous system of civilization Analogy Breaks

Calling communication technology a nervous system of civilization is useful for about five minutes. The comparison can expose structure that ordinary language hides. The problem begins when the comparison stops behaving like a tool and starts behaving like a claim about what the thing literally is.

For a telephony and network engineer, protocols show civilization as negotiated interoperability: independent systems agree on enough structure to create temporary paths between people.

What the metaphor gets right

For a telephony and network engineer, protocols show civilization as negotiated interoperability: independent systems agree on enough structure to create temporary paths between people.

This is why engineering metaphors are so attractive. They compress a complicated relationship into something we can manipulate mentally. In the best case, the metaphor produces predictions and sharper questions.

What it smuggles in

A network can deliver a message without guaranteeing truth, understanding or social benefit. Transport success and semantic success are separate layers.

Engineering words often carry hidden assumptions: a designer, a specification, modular ownership, explicit goals, a stable machine underneath the program. Those assumptions must be tested rather than inherited.

Return to the physical story

Communication systems combine encoding, transmission, addressing, routing, synchronization, error handling and social convention. New media change not only speed but which relationships and institutions become possible.

Once the mechanism is back in view, the analogy can be kept on a short leash. We can state which relation is genuinely similar and which difference would make the analogy generate a wrong prediction.

My three tests for a metaphor

1. What mechanism does this comparison help me see?
2. Which engineering assumption does the natural system not share?
3. What would I predict incorrectly if I took the comparison literally?

The third test is the most important. An analogy that cannot fail is decoration, not explanation.

Beyond the borrowed language

Telegraphy, telephony, packet networking and mobile systems repeatedly converted physical signals into shared abstractions that could scale beyond one device or operator.

Communication technology externalizes part of humanity's coordination machinery and changes the effective distance between minds.

When communication becomes planetary and nearly instantaneous, what happens to institutions evolved for slower information?

A good metaphor should eventually make itself less necessary. It gets us close enough to the real system that we can see where the scaffolding ends.

Reading trail

• Aeon — Information theory and life's origins
• The Carl Sagan Portal

These links are starting points for the scientific and historical ideas. The systems interpretation, analogies and conclusions here are my own.