Persuasion is the attempt to move someone's judgement, and the whole subject fits on one map. Aristotle drew it first: an audience is moved by who is speaking, by the state it is put in, and by what the argument shows. Modern research kept that map and added three things — careful versus shortcut thinking, the automatic triggers compliance rides on, and framing, where the same outcome persuades differently by how it is described. Negotiation is persuasion with two sides, ethics is the line the law draws, and the last chapter is where it is applied.
Each chapter opens with the short version. Tap one to read the detail.
Three levers, and which one to pull
~2 min
Aristotle's three modes of persuasion — the speaker's character, the audience's frame of mind, and the proof in the words — are still the top of the map. Character carries most where certainty is impossible; the enthymeme, an argument with a premise left unsaid, is the working unit of proof.
Seven automatic triggers, and the one that backfires
~3 min
Reciprocity, consistency, social proof, authority, liking, scarcity and unity are shortcuts people take instead of weighing a request. They work because they are usually right. The trap is advertising how common a bad behaviour is — a descriptive norm pulls people toward it.
The same outcome, coded as a gain or a loss
~2 min
Prospect theory says people value changes from a reference point, not final states, and losses weigh roughly twice as much as equal gains. Framing works by moving the reference point; anchoring works by making one value easy to reach. Defaults decide outcomes because doing nothing is the path of least effort.
Two routes to attitude change, and why only one lasts
~3 min
The elaboration-likelihood model splits persuasion into a central route, where the merits are scrutinised, and a peripheral route, where cues do the work. Central-route attitudes persist and guide behaviour; peripheral ones fade. Dissonance, self-perception, inoculation and reactance are the other mechanisms every practitioner meets.
Sequential requests, named effects, and the line the law draws
~3 min
Foot-in-the-door, door-in-the-face, low-ball and that's-not-all are two-step requests that ride on commitment, reciprocity and contrast. Giving people the words to say no makes their yes more voluntary. Where a technique hides a cost or fakes a choice, it stops being persuasion and becomes a practice the Federal Trade Commission regulates.
Alternatives, first offers, and the turning point
~2 min
Negotiation is a reciprocal exchange of offers and counteroffers; bargaining trades resources for benefit. Your best alternative sets your power. Anchoring favours the first offer only when you know the range — weak, anxious buyers open badly. A cooperative departure is a turning point worth matching.
Where persuasion ends and deception begins
~3 min
The working tests are simple: does the technique give reasons or bypass them, and would the target still agree if the technique were disclosed? Advertising law makes the same cut in enforceable terms — claims must be truthful, evidence-based and not misleading by omission, endorsements honest and typical, and disclosures as prominent as what they qualify.
Meeting the audience where it stands
~2 min
Persuasion is greatest when the advocated position sits just outside what the audience already accepts — too far and it is rejected outright. Write for the reader and put the point first. Identified individuals move donors where statistics do not. Measure behaviour, because agreement is cheap.
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