Planned Obsolescence:
which claims hold up, and what repairability is worth

Products with a design deadline

If advertising manufactures the desire to buy, planned obsolescence manufactures the need to buy again.

This chapter covers two genuinely different things that get lumped under one phrase. One is a documented but contested cartel. The other is an openly acknowledged, uncontested business strategy. The difference matters.

The lightbulb cartel

In January 1925, major lightbulb manufacturers formally incorporated an international cartel in Geneva. Osram, Philips, the Compagnie des Lampes, and General Electric — the last participating indirectly through an overseas subsidiary, reportedly to limit its US antitrust exposure. They divided world markets into territories and quotas.

The cartel also enforced a standardized bulb lifespan of roughly 1,000 hours, and it had real teeth: a central testing laboratory in Switzerland, and a documented schedule of fines levied against manufacturers whose bulbs lasted too long, alongside separate fines for exceeding sales quotas.

This isn't speculative history. It rests on archival correspondence and meeting minutes a media historian found in Osram's own corporate archive decades later, and it's corroborated by a 1949 US antitrust finding against General Electric touching the same international lamp-cartel conduct.¹

Where the popular retelling overreaches: bulbs before the cartel commonly ran 1,500 to 2,000 hours, occasionally as long as 2,500. Not a single clean number. The popular "2,500 down to 1,000" framing compresses a range into a soundbite more dramatic than the record supports.

More importantly, the "engineered sabotage for profit" framing skips a genuine engineering trade-off. A filament run hotter produces more light per watt but burns out faster; run cooler, it lasts longer but wastes more energy as heat. The cartel's own defenders invoked exactly this.

Whether settling on 1,000 hours reflected a legitimate optimization of that trade-off, or whether the fine structure — penalizing longer-lived bulbs specifically — shows the real motive was suppressing durability for profit, is a live disagreement in the historical record. Not a settled question, whatever a given retelling implies.²

The pamphlet that named the idea

In 1932, a New York real estate broker named Bernard London self-published a pamphlet titled Ending the Depression Through Planned Obsolescence, registering it with the Library of Congress.³

London's diagnosis was that consumers were keeping cars, tires, radios and clothing in use far longer than manufacturers expected, starving industrial demand. His proposed fix was genuinely radical: the government would assign every consumer product a legally mandated expiry date, after which the item would become legally "dead" and have to be turned in or destroyed. Replacement purchases forced on a schedule, as deliberate economic stimulus.

It was never adopted, and London remained obscure. But he's credibly the source of the term "planned obsolescence" itself — coined in earnest as public policy, rather than as a critique of industry.

Detroit's version, and why it's a different claim

The clearest and least contested version isn't a secret cartel at all. It's a strategy General Motors adopted openly under president Alfred Sloan from the mid-1920s, in response to a market where most households who wanted a car already had one.

Rather than compete only on mechanical improvement, GM introduced annual model-year styling changes. It formalized this in 1927 by creating the industry's first dedicated styling department — initially the Art and Color Section, led by designer Harley Earl.

Sloan named the strategy "dynamic obsolescence" and discussed it candidly in his own memoir. There's no hidden-archive reveal, no antitrust case, no dispute about whether it happened or why.⁴

It's mainstream business history, aimed at aesthetic and psychological obsolescence — the desire for the new look — not at degrading a car's durability or safety. Treating this and the lightbulb cartel as the same kind of claim, at the same evidentiary weight, overstates the contested one and undersells how openly the other was always discussed.

Where Plenee fits

Depreciation is where this history lands practically. Every category built on a replacement cycle — cars, phones, fashion, appliances — depreciates on a curve shaped partly by decades of deliberate decisions about how long a product should stay desirable or functional.

Knowing the replacement cycle was engineered rather than purely organic wear doesn't change the arithmetic of buying the three-year-old version of anything. It just explains why that arithmetic works as well as it does.

The takeaway

"Planned obsolescence" covers two claims deserving different confidence levels. A real, archivally documented lightbulb cartel that enforced shorter bulb life, with a genuine ongoing dispute over whether that reflected engineering trade-offs or manufactured profit. And Detroit's openly acknowledged strategy of styling changes designed to make last year's car feel outdated. Both aimed at more frequent purchases. Only one required secrecy to work. The other just required good taste, freshened annually, and nobody involved ever pretended otherwise.