Part IV: Field Autopsies

The Same Mistakes, Eight Different Ways

Parts I through III built a general framework: how wrong ideas enter, why they persist, and how they are eventually corrected. The framework is only as good as its ability to explain real cases. Part IV puts the framework to the test by applying it to eight disciplines -- medicine, economics, psychology, nutrition science, criminal justice, military strategy, technology, and education -- each with its own history of confident error, its own persistence mechanisms, and its own painful path toward correction. These are not brief surveys. They are deep, structured dissections -- autopsies performed on fields that are still alive, still producing knowledge, and still carrying the structural vulnerabilities that generated their past mistakes.

The most striking finding across these eight autopsies is not the differences between fields. It is the similarities. Medicine and military strategy share almost nothing in terms of subject matter, methodology, or institutional culture. Yet both sustained wrong consensuses for decades through the same mechanisms: authority cascades that propagated a prestigious early answer, incentive structures that rewarded adherence to the consensus, consensus enforcement that marginalized dissenters, and sunk costs that made abandoning the wrong answer feel more dangerous than defending it. Economics and criminal justice occupy different intellectual universes, yet both fell into the precision-without-accuracy trap -- producing numbers that looked rigorous while being systematically wrong. Psychology and nutrition science developed independently, yet both discovered in the same decade that large portions of their published findings could not be replicated.

Each field autopsy follows the same structure: how the error entered, which persistence mechanisms kept it alive, what eventually broke through, and what the field looks like now. By the end of Part IV, you will have seen the book's framework tested against 2,500 years of medical error, a century of economic modeling, the replication crisis in psychology, fifty years of dietary fat mythology, hundreds of wrongful convictions, repeated failures of military doctrine, the boom-and-bust cycles of technology, and the stubborn persistence of ineffective educational practices. The patterns will be unmistakable. And the question will shift from "do these failure modes really operate across fields?" to "what can we do about them?" -- which is the subject of Part V.

Chapters in This Part