Most theories of influence start in the wrong place. They study the message, the messenger, or the design of the choice. But the more important question is prior to all of that: is the person reachable? A poster, a slogan, a warning, a tweet, a therapist’s instruction or a government briefing can all be perfectly designed and still do nothing if the mind receiving it has closed the door.
The central claim of this explainer is simple. Human beings do not update continuously. They defend themselves against noise. Most signals are ignored, diluted, mocked, postponed or fitted into existing habits. But under certain conditions the defensive system relaxes. Attention narrows. The body assigns urgency. The outside world suddenly feels instructional. That is the gate opening.
Fear is the most powerful opener. It makes information feel immediately relevant. It turns distant possibility into personal danger. It gives authority a route into behaviour. It can also make blame, shame and obedience unusually teachable. Once fear has opened the gate, small cues can have large effects.
Two kinds of learning
There is ordinary learning by repetition: try, fail, adjust, repeat. Skills, habits and associations often accumulate this way. It is slow, wasteful and robust. It is how a person becomes better at a task through practice, or how a public comes to recognise a slogan through constant exposure.
There is also gated learning. In gated learning the key variable is not repetition alone but permission. The mind asks, usually without conscious words, whether this signal should be allowed to change anything. Fear, trust, exhaustion, novelty, authority, social pressure and personal relevance can all open the gate. Distrust, boredom, anger, identity threat and perceived manipulation can close it.
This distinction explains why a single sentence can persuade one person, bounce off another, and radicalise a third in the opposite direction. The words are the same. The gate is different.
Try it
Move the gate
Choose a kind of message and change the level of fear, trust or receptivity. The point is not that the message has no meaning. The point is that meaning changes when the receiver changes.
Covid made the mechanism visible
The early pandemic was a mass experiment in gated learning. The British public did not personally test every claim about the virus. People reacted to numbers, televised briefings, hospital images, rules, slogans, stories from friends, images of overwhelmed wards, and the visible behaviour of political leaders. These signals entered a population already primed by fear of illness, death, isolation and social punishment.
That fear made behaviour change possible at a speed that would have seemed implausible a few months earlier. “Stay at home” was not merely an instruction. Under fear, it became protection, duty and social identity. The same applies to the phrase “protect the NHS”. In a low-fear environment it would have been civic branding. In a high-fear environment it became a moral rule.
Boris Johnson mattered because he became the central political container for the crisis. His office, illness, briefings, hesitations, reversals and later scandals all carried more weight than ordinary political signals. In a crisis, a leader is not just a communicator. The leader becomes a symbol through which the public interprets danger, competence, sacrifice and betrayal.
Where Labour fitted in
The opposition’s role was not simply to oppose the government’s fear politics. Its more important function was to validate the seriousness of the threat while redirecting the moral meaning. The criticism was usually not that the public had been made too afraid. It was that ministers had acted too slowly, too chaotically, too lightly, or with too little regard for workers, care homes, schools and the vulnerable.
That gave the fear frame cross-party legitimacy. The governing party could issue rules. The opposition could insist the rules and protections should have been clearer, earlier, stronger or fairer. The public heard not a dispute over whether the danger was real, but a dispute over who had failed to protect people from it.
The political conversion
Fear of the virus became judgement about competence. Compliance pain became anger at hypocrisy. Private loss became public blame. That conversion was the political story.
Twitter turned fear into attribution
Social media did not merely amplify information. It selected for emotional velocity. The most repeatable political messages were not careful accounts of policy failure. They were compressed blame statements, moral images and slogans. A phrase such as “blood on his hands” did a particular kind of work. It joined fear to responsibility. It told the reader not only that people had died, but that the deaths should be attached to a named political figure.
This is why algorithmic recommendation matters. A platform can make a claim feel socially obvious by showing it again and again, especially when the claim provokes anger, agreement, disgust or argument. Whether the original source is a party activist, a journalist, an ordinary user or a campaign account matters less than the resulting experience. The feed becomes a curriculum. It teaches what emotion belongs to the event.
In this case, the lesson was not simply that Covid was dangerous. It was that fear should be translated into political blame. The platform supplied repetition. The user supplied attention. The body supplied arousal. Together they made a moral association feel natural.
The problem with nudge
Nudge theory is useful but incomplete. It focuses on small changes to the environment: defaults, reminders, friction, ordering, convenience, salience and social proof. These tools can work very well when the person is already mildly receptive. They are less impressive when the person has closed the gate.
A reminder from a trusted institution can feel helpful. The same reminder from a distrusted institution can feel like control. A social-norm message can make someone conform if they still identify with the group being invoked. If they reject that group, it can harden resistance. A behavioural cue does not carry its effect inside itself. Its effect is produced at the meeting point between message and receiver.
The Covid example makes the weakness stark. Some public-health messaging worked because fear had already made people reachable. The slogan did not create the condition from scratch. It passed through an opening produced by danger. Once trust broke, the same machinery could malfunction. A nudge became nagging. A safety cue became evidence of manipulation. An official voice became part of the problem.
Hypnosis without the theatre
Hypnosis is best understood not as mind control but as a temporary change in attention. In ordinary anxiety, the fast, automatic part of the mind throws up panic signals: images, body alarms, catastrophic predictions, urges to avoid, or the sense that something must be done immediately. Those signals seize control before the person can learn a different response.
Good hypnosis creates a protected interval. The person narrows attention, reduces the force of peripheral alarm, and becomes able to hold a thought or sensation without being dominated by it. That does not mean another person has taken over the will. It means the subject has accepted a frame in which automatic fear output is softened long enough to practise a new relationship to it.
This is why hypnosis can make sense as a way of dealing with “bad programming”. The programme is not deleted by magic. The old fear loop is interrupted. The person experiences, even briefly, that the alarm is not sovereign. A sensation can be tolerated. An image is not the event. An urge can pass. A fear signal is information, not a command.
The finished argument
Influence is not a straight line from message to behaviour. It is a gated process. First, the person or population must become reachable. Fear is the strongest way to make that happen, although trust, need and fatigue can also do it. Once the gate is open, slogans, nudges, tweets, leaders and therapists can have effects far larger than their surface content suggests.
The ethical question is therefore not only what message was sent. It is what state the receiver was placed in before the message arrived. A society that understands this will be more sceptical of easy behavioural science, more cautious about fear-driven politics, more alert to algorithmic repetition, and more realistic about therapeutic techniques that help people regain control over attention.