The thinking behind the thinking
Ideas
Every essay on this site reaches for the same small set of ideas. Here each one is explained once and properly: where it came from, what it says about the mind, where it shows up in the history of technology, and the best argument against it.
Judging decisions
How we grade a choice after the fact, and why the grade so often measures luck, survival or the story we tell afterwards rather than the quality of the thinking.
- Explaining Winners and Losers Alike A good explanation of why a technology won must use the same kinds of causes that it uses to explain why its rivals lost, instead of crediting the winner's superiority and blaming the loser's flaws.
- Exploring and Exploiting Every choice between doing more of what is known to work and trying something uncertain is a trade-off between exploiting and exploring, and individuals and organisations that only exploit eventually find their knowledge out of date.
- Hindsight and the Illusion of Inevitability Once we know how something ended, we cannot easily remember that it might have ended differently, and the past starts to look as if it had to happen.
- Moral Luck and Outcome Bias We judge a decision by how it turned out, even when we know that how it turned out was largely a matter of luck.
- Silent Evidence The cases we can see are the ones that survived, so lessons drawn only from survivors systematically mislead.
- When Small Risks Become Normal Organisations come to accept warning signs as normal through a series of reasonable-seeming decisions, each building on the last, until a risk that once would have stopped everything is routine.
How minds decide
What happens inside a person, or a room of people, in the moment of choosing: limited attention, fear of loss, the pull of what has already been spent.
- Bounded Rationality and Satisficing Real decision-makers cannot consider every option or compute every consequence, so they search until they find something good enough, and the structure of their environment decides whether that works.
- Cognitive Dissonance and Bad Faith When evidence contradicts a commitment we have made, we tend to change our reading of the evidence rather than the commitment, and we do it in a way we cannot see ourselves doing.
- Groupthink and the Silence of Rooms Groups of capable people can reach decisions that almost none of them privately believe in, because the wish for agreement suppresses the doubts each member holds.
- Loss Aversion and the Pull of the Status Quo Losses hurt more than equal gains please, so people and companies overvalue what they already have and treat change as a loss even when it is a gain.
- Overconfidence and Calibration People are more certain than they are right, and the cure is to state beliefs as probabilities and keep score.
- Risk and Uncertainty Some futures can be described with probabilities and some cannot, and treating the second kind as if it were the first is one of the most expensive mistakes a decision-maker can make.
- Sunk Costs and the Escalation of Commitment Money and effort already spent cannot be recovered, yet people keep investing in failing projects to justify what they have already put in, especially when they made the original choice.
- The Architecture of Choice Every way of presenting options influences what people choose, especially through defaults, order and effort, so whoever designs the choice is responsible for its direction whether they intend it or not.
- The Inside View and the Outside View We forecast our own projects by imagining how they will unfold, and ignore how similar projects actually turned out; the second method is far more accurate.
- The Mind Beyond the Head When a tool is reliably available and automatically trusted, it becomes part of how we think, so changing the tool changes the mind that uses it.
- Trusting the Machine Too Much People tend to accept what automated systems tell them and to discount contradicting evidence, even from their own eyes, while the automation itself erodes the skills they would need to catch its errors.
- We Know More Than We Can Tell Much of what skilled people know cannot be fully put into words or rules, so it is lost when work is reduced to documents, systems or models trained only on what was written down.
How systems shape choices
The forces outside any one mind: markets, networks, organisations and measures, which decide much of what is possible before anyone sits down to decide.
- Creative Destruction Economies grow when new products, methods and firms displace old ones, so progress always destroys some existing businesses, jobs and skills, and the firms that lead today are the ones most exposed to it tomorrow.
- Designing Rules People Will Not Game Instead of hoping people will behave honestly, design the rules so that honesty is in their own interest, because people respond to incentives and keep private what they know.
- Exit, Voice and Loyalty When a product or organisation declines, people can leave or complain, and which they choose, and whether anyone listens, decides whether decline can be reversed.
- Governing What Everyone Shares Resources that everyone uses and no one owns tend to be overused or under-maintained, unless the people who depend on them build rules for using, monitoring and sustaining them, which many communities have done for centuries.
- Irreversibility and the Value of Waiting When a decision cannot be undone and the future is uncertain, keeping the option to decide later has real value, which should be counted against the benefits of committing now.
- Legibility and Mētis Large organisations simplify the world so they can see and control it, and in doing so they destroy the practical, local know-how that made the messy original work.
- Markets With Two Sides A platform that serves two groups who need each other, such as buyers and sellers or users and advertisers, sets prices to get both on board, usually charging one side and subsidising the other, and that choice shapes everything the platform becomes.
- Organisations Ship Their Own Shape The structure of a system tends to copy the communication structure of the organisation that built it, so choosing how to organise people is also choosing what the product will look like.
- Path Dependence and Lock-In When a technology becomes more valuable the more people use it, small early events can decide which one wins, and the winner can stay locked in long after better alternatives appear.
- Predictions That Make Themselves True When people act on a prediction or classification, their actions can bring about what was predicted, so that models, rankings and forecasts shape the world they claim only to describe.
- Rules People Can Live By Rules govern well only when people can know them in advance, rely on them staying stable, understand them and see them applied consistently, whether the rule-maker is a state, a platform or a company.
- The Jevons Paradox Making a resource cheaper to use often increases total consumption of it, because the savings open up new uses that did not exist before.
- The Knowledge No One Holds The knowledge needed for good decisions is scattered among many people, much of it local and impossible to put into words, so no central decision-maker can ever gather it all.
- The Remedy That Is Also a Poison Every technology that strengthens a human capacity also weakens it somewhere, so the question is never whether a tool is good or bad but what it gives, what it takes and who decides the dose.
- When a Measure Becomes a Target Any number used to judge and reward people starts to change their behaviour in ways that make it a worse measure of what it was meant to track.
- When Buyers Cannot Judge Quality When sellers know more about quality than buyers, buyers pay only for average quality, the best sellers leave, and the market can unravel unless something makes quality visible.
- Whoever Controls the Gate When information, goods or people must pass through a channel controlled by a few, the choices of those gatekeepers shape what everyone else sees, buys and becomes, and their power grows with the narrowness of the gate.
- Why Firms Exist A company makes something itself rather than buying it when the cost of arranging the purchase, negotiating, monitoring and protecting against being held hostage exceeds the cost of doing it inside.
- Why Good Management Fails Incumbents lose to new technologies not through stupidity but by doing exactly what good management prescribes, listening to their best customers and investing where margins are highest.
- Why Rivals Become Copies Competitors watch each other more closely than they watch customers, and come to want the same things and build the same products, until the market is a crowd of near-copies fighting over the same ground.
The one who decides
What kind of person decides well, and what it means to choose when every option costs something.
- Practical Wisdom Good decisions in particular situations come from a trained capacity to see what matters and what to do, which cannot be reduced to rules, frameworks or theory, though it can be cultivated.
- Tragic Choices and What Remains Some decisions involve values that cannot be measured on a single scale, so that every option sacrifices something genuinely good, and the right response is to choose and acknowledge the loss rather than pretend it away.
- Wanting What We Want to Want People have desires about their desires, and freedom consists less in getting what we want at the moment than in acting on the desires we endorse, which products and organisations can help or undermine.