Definition
Frightening vs dangerous is the distinction between two largely independent properties of a hazard: how much fear it elicits and how much actual harm it causes. The two are often inversely correlated — what frightens most kills few; what kills most frightens little.
Sharks, terrorist attacks, and plane crashes top the fear lists. Heart disease, road traffic, and drowning top the harm lists. The rank-orders barely overlap, and confusing them is what Rosling calls the Fear Instinct.
Why it matters
How it works
Fear is a fast, embodied reaction to features like suddenness, novelty, lack of control, identifiable victims, and gore. Danger is a slow statistical property — expected harm averaged over many encounters. The mismatch is wired in: evolution favoured fast reaction to predator-like cues, not multiplication.
To audit your own fear/danger map, list five things you actively avoid because they feel dangerous and five things you tolerate because they feel safe. Look up the per-capita death rates for each. The order will usually scramble.
The Rosling-style move is not to suppress fear — fear is a useful first filter for what merits attention — but to refuse to budget time and money based on it alone. Once a hazard registers, ask what its actual harm rate is. If the two ranks disagree, danger wins for resource allocation; fear may still win for personal feeling.