Latané and Darley's model of bystander intervention breaks the failure into five steps, and the value of the model is that it identifies where the failure occurs rather than attributing it to indifference.
Notice that something is happening. Interpret it as an emergency. Assume personal responsibility. Know what to do. And act.
Failure at any step produces inaction, and the middle three are where it usually happens. Interpretation fails through pluralistic ignorance, chapter 9: everyone reads everyone else's calm as evidence that nothing is wrong. Responsibility fails through diffusion: with many people present, the felt duty divides. And knowing what to do fails through simple lack of a script.
Each of those has a countermeasure and none of them requires courage.
Interpretation: say what you are seeing out loud. Naming the situation destroys the ambiguity that sustains the group's collective misreading, and it converts other people's silence from evidence into what it is.
Responsibility: assign it to a specific person, including yourself. You, in the green jacket, call an ambulance. First aid training has taught this for decades because it works.
Knowing what to do: have a script in advance. The bystander intervention programs used in universities and workplaces teach a small set — the direct approach, distraction, delegation, and delay, meaning checking with the person afterwards — precisely so that the response does not have to be invented under pressure.
Zimbardo's Heroic Imagination Project takes the further step of framing this as trainable rather than dispositional. Its argument, which follows from his own career, is that if situations produce ordinary people doing terrible things, then situations can also produce ordinary people doing necessary ones, and the difference is preparation rather than character.
Evaluations of bystander intervention programs — most extensively in the sexual violence prevention literature — find gains in intervention self-efficacy and in reported intervening behavior.
The connection to this guide is chapter 306, and it is worth making explicit because it is the most useful thing in this chapter.
Asch's finding was that one visible dissenter restores independent judgment for most people in the room. That dissenter is a bystander who acted. When you speak up about something that is wrong — in a meeting, in a family, in a group of friends — you are not only registering your own view. You are functioning as the ally that everyone else in the room needs in order to be able to speak, and they cannot know you exist until you do.
This counters Law 19.
Counters Law 19 — Let the Crowd Deliver Your Message