Cascade of Effects

Ink-lit paper architecture thumbnail of a clean space shuttle launch stack.

Challenger

How the Warnings Stopped Working

A chain of engineering warnings, schedule pressure, and normalized cold-weather risk turned one launch decision into catastrophe.

Ink-lit paper architecture thumbnail of a clean medical linear accelerator and treatment couch.

Therac-25

The Machine That Was Trusted Too Early

Software assumptions, interface design, and institutional disbelief combined to let lethal radiation overdoses repeat.

Ink-lit paper architecture thumbnail of a clean hotel atrium with suspended walkways.

Hyatt Regency

The Redesign That Doubled the Load

A shop-drawing revision doubled the load on an already weak walkway connection, turning a routine fabrication change into catastrophe.

Ink-lit paper architecture thumbnail of a simplified nineteenth-century hospital ward with a washing basin.

Semmelweis

The Evidence Medicine Rejected

Hospital mortality ledgers exposed the cause chain, but the profession resisted what the evidence implied about its own routines.

Ink-lit paper architecture thumbnail of a clean suspension bridge on a dry paper model base.

Tacoma Narrows

The Bridge That Lost Its Margin

A wind-structure feedback loop the design process had not accounted for turned visible oscillation into collapse.

Ink-lit paper architecture thumbnail of a fossil skull and jaw specimen on a museum plinth.

Piltdown Man

The Fossil That Flattered Authority

A flattering fossil story survived because authority, expectation, and weak scrutiny protected the lie.

Ink-lit paper architecture thumbnail of a clean modern passenger jet on a paper runway.

737 MAX

The Hidden System That Moved the Risk

A hidden flight-control behavior moved risk onto crews who had been trained to believe the aircraft was familiar.

Ink-lit paper architecture thumbnail of a clean early ocean liner on a dry display plinth.

Titanic

Legal, Compliant, and Not Safe

A ship could be legal, compliant, and still unsafe when lifeboat regulation lagged behind scale.

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