The Bed of Procrustes

The title comes from the Greek myth of Procrustes, the innkeeper who made guests fit his bed by stretching them or cutting off their legs. Taleb uses it as a metaphor for the modern habit of reshaping people and facts to fit our theories rather than the reverse, from blaming reality when it fails to match economic models to defining intelligence as whatever can be tested in a classroom.

Taleb, a former options trader turned risk scholar, wrote it as one volume of his Incerto series, and it works as a compressed index to his ideas: randomness and success, robustness and fragility, the ludic fallacy, the scandal of prediction and the ethics of having skin in the game.

The form has limits. Aphorisms are uneven by nature, and Taleb's contempt for academics, journalists, bankers and corporate employees can grate when packed this densely. There is no argument to follow, only provocations to accept or reject. The 2016 expanded paperback adds roughly 50 percent more material to the 2010 hardcover.

It rewards readers who already know Taleb's longer books and want a portable version of his worldview. Risk managers and traders will find many of his ideas on fragility and model error in their sharpest form here.

1. Do not cut reality to fit the model. When markets violate a model's assumptions, the model is wrong, not the market. Risk systems built on neat distributions invite exactly the error the myth describes.
2. Prediction is mostly theater. Taleb's section on the scandal of prediction is a reminder to build positions that survive being wrong rather than to rely on forecasts.
3. Subtraction often beats addition. Removing fragilities, debt, bad habits and bad advisers usually does more good than adding new strategies or information.
4. Domain dependence fools experts. People who reason well about risk in one setting often fail to transfer it to another, a warning for quants and executives alike.
5. Independence has value. Taleb's jabs at the monthly salary and at advice from people without skin in the game point to a practical rule: weigh opinions by what the speaker stands to lose.

The book is a sequence of short themed sections, each a page or several pages of one- and two-line aphorisms, framed by an opening essay on Procrustes and a closing postface. The groups below are by theme; the sections themselves run in a slightly different order.

1. Framing. An opening note explains the myth and the central idea: when theory and reality conflict, modern institutions change reality.
2. Narrative and the sacred. Sections such as Preludes, Counter Narratives, Matters Ontological, and The Sacred and the Profane attack our taste for tidy stories and explanation.
3. Luck and living. Chance, Success, Happiness, and Stoicism; Charming and Less Charming Sucker Problems; and Theseus, or Living the Paleo Life cover luck, status and natural living. The Republic of Letters and The Universal and the Particular take aim at intellectuals and journalists.
4. Risk and knowledge. Fooled by Randomness, Robustness and Antifragility (titled Robustness and Fragility in the first edition), The Ludic Fallacy and Domain Dependence, Epistemology and Subtractive Knowledge, and The Scandal of Prediction hold the material most useful to markets.
5. Ethics and economic life. Aesthetics, Ethics, Being a Philosopher and Managing to Remain One, Economic Life and Other Very Vulgar Subjects, The Sage, the Weak, and the Magnificent, and The Implicit and the Explicit set out his code of honor, independence and skin in the game. The book ends with On the Varieties of Love and Nonlove and The End.